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The Fishy Aleks Sweater Pattern

The Fishy Aleks Sweater Pattern
4.0β˜… Rating
12-15 Hours Time Needed
3.2K Made This
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Intermediate Level

Ideal for those with basic crochet experience, featuring slightly more advanced stitches and techniques to expand your skills.

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Multi-Day Project

A rewarding 12+ hour journeyβ€”perfect for dedicated crafters who love detailed work.

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Casual Chic

Relaxed style with a modern twist, perfect for everyday wear while maintaining that handcrafted uniqueness.

About This The Fishy Aleks Sweater Pattern

This pattern creates a roomy, HDC-stitched sweater with a bold intarsia fish motif on the front panel. It includes two graph sizes for the fish so you can tailor the design to different garment sizes. The sweater is made from two rectangular panels (front and back), two sleeves, ribbing, and a collar, all crocheted in half double crochet.

The Fishy Aleks Sweater Pattern crochet pattern - detailed view of completed project

Youll learn how to change colors cleanly and when to use intarsia versus carrying yarn, plus a double-threaded yarn option for variegated texture. Full yardage guidance and step-by-step instructions are included for sizes XS to 5XL.

Why You'll Love This The Fishy Aleks Sweater Pattern

I absolutely love this pattern because it combines bold graphic design with simple construction β€” two rectangular panels and sleeves make it great for crocheters who enjoy finishing work. I love how the intarsia fish becomes the focal point and lets you play with colours and textures. Working the graph in HDC gives a nice, dense fabric that wears beautifully while remaining soft. The pattern is flexible, so I often tweak sizing and yarn choices to create unique versions.

The Fishy Aleks Sweater Pattern step 1 - construction progress The Fishy Aleks Sweater Pattern step 2 - assembly progress The Fishy Aleks Sweater Pattern step 3 - details and accessories The Fishy Aleks Sweater Pattern step 4 - final assembly and finishing

Switch Things Up

I love how easy it is to customise this pattern by changing colours β€” try pastel tones for a soft, retro look or bold neons for a modern twist.

You can make the fish smaller or larger by swapping between the provided graphs, or create a completely new motif by drawing your own pixel graph to fit the same stitch counts.

I sometimes swap the base aran yarn for a slightly thicker bulky yarn and a larger hook to create a chunky, cozy version that works up faster.

If you want a lighter sweater, use a DK or worsted yarn and size down the hook, but remember to swatch and recalculate your foundation chain for correct placement.

I like to add embroidered details over the intarsia after finishing to sharpen features like the eye or scales for extra personality.

Try changing the collar style by making a taller ribbing or a shallow funnel neck; simply chain longer for the collar foundation and test fit before finishing.

For sleeves, make them tapered by decreasing a few stitches evenly as you work downwards, or keep them straight for a boxy, relaxed fit.

I sometimes add pockets or a contrasting hem by crocheting a short ribbed strip and sewing it on at the bottom for a sporty look.

Make it unisex by adjusting length and ease; follow the larger size instructions and remove some length for a more fitted silhouette.

Don't be afraid to mix yarns β€” using a single ply mohair with one strand of aran gives a haloed, soft fabric that looks high-end and cozy.

Common Mistakes & How to Fix Them

βœ— Not making a gauge swatch before starting; this sweater relies on a specific HDC gauge so make a 10x10 cm swatch to ensure your measurements match the pattern. βœ— Ignoring the recommendation to start the graph on an odd row can throw off placement; always check the listed odd-row start numbers and align your foundation tail facing left as instructed. βœ— Carrying color across many stitches can cause colour bleed-through; use intarsia and work with small skeins per color to avoid long floats and tangles. βœ— Skipping stitch markers for neckline and shoulder shaping will cause miscounts; place a stitch marker at the exact stitch numbers called out for shaping to keep symmetry. βœ— Forgetting to finish on an even or odd row when adjusting length will shift the graph/neckline alignment; always ensure you end on the row parity the pattern specifies before starting shaping.

The Fishy Aleks Sweater Pattern

Make a cozy, graphic sweater featuring a charming intarsia fish motif you can wear every day. This pattern guides you through whole-panel crochet in HDC with clear graphing instructions and two fish sizes, so you can personalise the placement and scale. Youll learn color-changing, intarsia, and double-threaded yarn techniques while building front and back panels, sleeves, collar, and ribbing for a professional finish.

Intermediate 12-15 Hours

Materials Needed for The Fishy Aleks Sweater Pattern

β€” Main Fabric

  • 01
    Aran weight yarn (US terms, weight 4/worsted/aran) - base colour: Adlibris Socki Plus (100g = 156m) or similar, amount varies by size (see yardage table).
  • 02
    Total yarn (base + fish yarn) approx: XS: 400g / 624m
  • 03
    Total yarn (base + fish yarn) approx: S: 450g / 702m
  • 04
    Total yarn (base + fish yarn) approx: M: 600g / 936m
  • 05
    Total yarn (base + fish yarn) approx: L: 918g / 1432m
  • 06
    Total yarn (base + fish yarn) approx: XL: 1000g / 1650m
  • 07
    Total yarn (base + fish yarn) approx: 2XL: 1035g / 1750m
  • 08
    Total yarn (base + fish yarn) approx: 3XL: 1200g / 1980m
  • 09
    Total yarn (base + fish yarn) approx: 4XL: 1400g / 2310m
  • 10
    Total yarn (base + fish yarn) approx: 5XL: 1750g / 2890m
  • 11
    Fish/yarn for intarsia: small amounts of DK/scrap yarn - approximately 10-20g per colour for the fish (use small skeins to avoid long floats).

β€” Tools Required

  • 01
    Crochet hook size 5.0mm (recommended)
  • 02
    Scissors
  • 03
    Stitch markers or bobby pins
  • 04
    Tapestry/yarn needle for weaving and sewing
  • 05
    Small skeins of contrast DK/scrap yarn for the fish graph (10-20g per colour)
  • 06
    Pins for assembly (optional)

Progress Tracker

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β€” Materials :

Info :

Aran weight yarn for base (I used Adlibris Socki Plus 100g = 156m). Double-pulled DK weight scrap yarn for fish details. 5mm crochet hook. Scissors. Stitch markers / bobby pins.

β€” Configuration :

Info :

The sweater consists of two rectangular panels for the front and back, two sleeves, ribbing, and a collar. All is crocheted in HDC. Adjust width by adding/detracting STS, adjust length by adding/detracting rows, and try on as you go for best fit.

β€” Gauge and Yardage :

Info :

My gauge was 10x10 cm = 14 sts x 12 rows in HDC. Yardage shown in table is approximate and based on aran weight yarn (100g = 156m). The fish uses very little yarn and you will be fine with 10-20g per color.

β€” Notes on technique :

Infos :

How to change colors: Start the color change in your last ST of color A by starting the HDC in A and finishing in B; after pulling through color B counts as first ST in new color. Carrying the yarn vs Intarsia: Carrying brings non-working color with you; Intarsia drops unused colors. The author prefers Intarsia for a clearer finish. Double-threaded yarn: combining two different yarns gives variegated effect; the fish was mostly double-threaded.

β€” Graphing :

Info :

This pattern has one main graph for the fish (two sizes available). Each pixel = one stitch and each row of pixels = one row of crochet. After every row CH2 and turn your work; the CH2 TO is not included in the graph. Graphs are read bottom right to top left. The foundation chain is not included in the graph. CH2 TO at the end of each row are not included in the graphs.

β€” Written pattern - Front panel :

Foundation row :

CH (55, 61, 68, 76, 82, 88, 97, 103, 109).

Round R1 :

HDC in the third CH from your hook. HDC until the end of the row for a total of (53, 59, 66, 74, 80, 86, 95, 101, 107) STS. CH 2 and TO.

Round R2 :

HDC in each ST until the end of the row. CH2 and TO.

Info :

For sizes XS-S: Repeat R2 20 times, for a total of 22 rows. For sizes M-L: Repeat R2 24 times, for a total of 26 rows. For sizes XL-2XL: Repeat R2 30 times, for a total of 32 rows. For sizes 3XL-4XL: Repeat R2 36 times, for a total of 38 rows. For size 5XL: Repeat R2 42 times, for a total of 44 rows.

Info :

If you want a longer/shorter sweater, you may add/detract rows. Just make sure you finish on an even row, meaning the tail from your foundation row is facing left after you CH2 and TO at the end of your last row.

Info :

Start the fish graph after the base rows. There are two fish graph sizes; sizes XS-M use the smaller graph and L and upwards use the bigger graph to ensure enough padding on the sides so the fish is visible when panels wrap around.

Info :

The bigger fish measures 34cm width and 18cm height. The smaller fish measures 28cm width and 16cm height. It is important that you start the fish on an odd row: XS/S: 23, M/L: 27, XL/2XL: 33, 3XL-4XL: 39, 5XL: 45.

β€” Smaller Fish Graph :

Info :

The smaller fish is 39 STS wide and 16 R tall. To center your placement, detract 39 from your number of STS and divide that number by 2. The final number is the number of STS from each side (left and right) you should have before referring to the graph.

Info :

Example: size XS is 53 STS wide. 53 - 39 = 14. 14/2 = 7. There should be 7 STS of your background color on each side of the graph.

Round :

On an odd row (23, 23, 27), with your foundation chain tail facing left: HDC (7, 10, 13). Enter graph, starting at bottom right.

Round :

After the 39th HDC of each row, HDC (7, 10, 13), until end of the row. Repeat for 16 rows, until the end of the graph.

Round :

Exit graph and HDC in each STS for 14 rows, for a total of (52, 52, 56) rows.

Info :

** Please note: if you get a fraction when you calculate your placement and divide your STS count in two, e.g. 54-39 = 15 and 15/2 = 7.5, then HDC 7, enter graph, then HDC 8 after you exit the graph. **

β€” Bigger Fish Graph :

Info :

The bigger fish is 47 STS wide and 21 R tall. To center your placement, detract 47 from your number of STS and divide that number by 2. The final number is the number of STS from each side (left and right) you should have before referring to the graph.

Info :

Example, size L is 74 STS wide: 74 - 47 = 27. 27/2 = 13.5. To solve this, make 13 STS on one side and 14 STS on the other.

Round :

On an odd row (27, 33, 33, 39, 39, 45), with your foundation chain tail facing left: HDC (13, 16, 19, 24, 27, 30). Enter graph, starting at bottom right.

Round :

After the 47th HDC of each row, HDC (14, 17, 20, 24, 27, 30), until end of the row. Repeat for 21 rows until the end of the graph.

Info :

Continued: Exit graph and HDC in each STS for 9 rows, for a total of (56, 62, 62, 68, 68, 74) rows.

Info :

** Please note: if you get a fraction when you calculate your fish placement and divide your STS count in two, e.g. 66-39 = 27 and then 27/2 = 13.5, then HDC 13, enter graph, then HDC 14 after you exit the graph. Since the fish is not symmetrical, one stitch difference from the center won't be visible. **

β€” Neckline Shaping - Front :

Info :

At row (53, 53, 57, 57, 63, 63, 69, 69, 75) we will start the neckline shaping/shoulder extensions. The shoulder extensions are worked separately, meaning you do the left and right side one at a time.

Round Step 1 :

HDC (19, 22, 25, 29, 32, 35, 40, 43, 46). CH2 and TO.

Round Step 2 :

HDC2TOG. HDC until the end of the row. CH2 and TO.

Info :

Repeat step 1 and 2 for 8 rows, alternating between decreases. At the end of row 8, fasten off.

Info :

To make the other side, count STS from the edge and add a stitch marker in the (19, 22, 25, 29, 32, 35, 40, 43, 46)th ST. Attach your yarn by your stitch marker.

Round 1 :

HDC until the end of the row (19, 22, 25, 29, 32, 35, 40, 43, 46). CH2 and TO.

Round 2 :

HDC until there are two STS left on the row. HDC2TOG. CH2 and TO.

Info :

Repeat step 1 and 2 for 8 rows, alternating between decreases. At the end of row 8, fasten off. You should have a total of (60, 60, 64, 64, 72, 72, 78, 78, 84) rows for the front panel.

β€” Back panel :

Foundation row :

CH (55, 61, 68, 76, 82, 88, 97, 103, 109).

Round R1 :

HDC in the third CH from your hook. HDC until the end of the row for a total of (53, 59, 66, 74, 80, 86, 95, 101, 107) STS. CH 2 and TO.

Round R2 :

HDC in each ST until the end of the row. CH2 and TO.

Info :

For sizes XS-S: Repeat R2 54 times, for a total of 56 rows. For size M-L: Repeat R2 58 times, for a total of 60 rows. For sizes XL-2XL: Repeat R2 66 times, for a total of 68 rows. For sizes 3XL-4XL: Repeat R2 72 times, for a total of 74 rows. For size 5XL: Repeat R2 78 times, for a total of 80 rows. Or repeat however many rows you made your front panel, minus four (for the back panel's shoulder extensions).

β€” Neckline Shaping - Back :

Info :

At row (57, 57, 61, 61, 69, 69, 75, 75, 81) we will start the neckline shaping/shoulder extensions for the back panel. The shoulder extensions are worked separately, meaning you do the left and right side one at a time. The process is the same as it is for the front, but you do 4 rows of decreases instead of 8.

Round Step 1 :

HDC (17, 20, 23, 27, 30, 33, 38, 41, 44). CH2 and TO.

Round Step 2 :

HDC2TOG. HDC until the end of the row. CH2 and TO.

Info :

Repeat step 1 and 2 for 4 rows, alternating between decreases. At the end of row four, fasten off. To make the other side, count STS from the edge and add a stitch marker in the (17, 20, 23, 27, 30, 33, 38, 41, 44)th ST and repeat the same steps for 4 rows. Fasten off. You should have a total of (60, 60, 64, 64, 72, 72, 78, 78, 84) rows.

β€” Joining the panels :

Info :

When you've finished your two panels, it's time to seam them together at the shoulders. You may either SL ST them together or sew them together, whatever you prefer.

β€” Collar :

Info :

After you've joined the panels, let's make the collar. Start by attaching your yarn anywhere on your neckline. CH 1 and SC around. Make two rows of SC and SL ST to your starting point. From here:

Round Foundation :

CH 6 ST or however tall you want your collar to be.

Round 1 :

Starting from the 2nd CH from hook, SC in the BLO until the end of the row (5). SL ST in the next two STS. TO.

Round 2 :

SC in the BLO until the end of the row (5). CH1 and TO.

Round 3 :

SC in the BLO until the end of the row (5). SL ST in the next two STS. TO.

Info :

Repeat step 2 and 3 until your collar reaches around. Make sure you can fit your head through!

β€” Sleeves :

Info :

SL ST the two panels together going from the bottom up to create the sleeve holes. Modify how loose/tight you want the sleeve to be on your armpit. When satisfied, SC around the hole, slip stitching into the first ST. This will be your base.

Round Row 1 :

HDC in each ST. SL ST into the first ST. TO.

Info :

Repeat row 1 until you reach the length you wish. Repeat for the other side.

β€” Ribbing and arm cuffs :

Info :

This is how you make the ribbing: 1. CH to the desired height of ribbing + 1 (example: for 6 STS tall start by chaining 7). 2. HDC in each CH (6). 3. HDC in the BLO of each ST. 4. Repeat until ribbing reaches around both panels.

Info :

When you have your ribbing, attach it to the bottom of the sweater by SL ST or by sewing. For the cuffs: CH to the desired width of your cuff + 1. 1. HDC in each CH. 2. HDC in the BLO of each ST. 3. Repeat until cuff reaches around wrist. Attach cuffs to the bottom of the sleeve by SL ST or sewing.

β€” Finishing :

Info :

Now just weave in all those loose ends and you're all done!!!

Assembly Instructions

  • Seam the front and back panels together at the shoulders by slip stitching or sewing, matching the shoulder extension edges precisely.
  • Attach the collar by making a short chain foundation for the collar (CH 6 or desired height), work the small ribbing strip and then join it around the neckline, ensuring it fits over your head comfortably.
  • Join the side seams from the bottom up to the armholes, then slip-stitch or single crochet around the armhole to create the sleeve base before crocheting sleeves in the round.
  • Work sleeves to desired length in HDC, then create cuffs by chaining the desired width, HDC across and work in BLO to form ribbing; sew or slip-stitch cuffs to sleeve ends.
  • Attach ribbing to the bottom hem by slip-stitching or sewing the ribbed strip evenly around the body, easing any gathers to maintain even tension.

Important Notes

  • πŸ’‘Make a gauge swatch (10x10 cm = 14 sts x 12 rows in HDC) to ensure correct size and graph scaling before starting.
  • πŸ’‘Try the panels on as you work, especially before shaping necklines and sleeves, to avoid excessive frogging and ensure a good fit.
  • πŸ’‘Use stitch markers to mark specific stitch counts for shoulder and neckline shaping to maintain symmetry when working each side separately.
  • πŸ’‘Work intarsia with short skeins per color to avoid long floats and tangles; carrying yarn may cause colours to show through the fabric.
  • πŸ’‘When adjusting length, finish on the correct row parity (even/odd) as noted so the graph and neckline placement remain accurate.

This cozy Fishy Aleks sweater pattern is designed to be playful, wearable, and totally customizable β€” perfect for gifting or keeping! The intarsia fish adds bold personality while the simple HDC construction keeps the make approachable. Make it in your favourite colour palette and wear with pride. 🧢🐟✨

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FAQs

What size will the finished piece be?

The finished sweater size depends on the foundation chain chosen; the pattern gives measurements for XS to 5XL and the final bust is Width x2 (side-to-side x 2). Measure against the provided table and your gauge swatch for accurate sizing.

Can I use different yarn weights for this pattern?

You can, but your gauge and final size will change. If you use thinner yarn, size up (use a larger hook or add stitches/rows) to match the pattern measurements; always swatch first.

Do I need prior crochet experience for this pattern?

This pattern is rated intermediate and assumes familiarity with half double crochet (HDC), decreases (HDC2TOG), working in the BLO, changing colors, and following a graph (intarsia).

How long does this project typically take to complete?

This is a Multi-Day Project and often takes 12-15 hours depending on size, colorwork complexity, and your experience; graphwork and finishing can add time.