How to Knit a Classic Denim Look Sweater: Step-by-Step Tutorial for Beginners

Knit a Classic Denim Look Sweater
Introduction

If you’re looking for a timeless knitting project that combines comfort, warmth, and classic style, this cozy denim-look sweater is the perfect choice. Designed with traditional cables and neat shaping, it’s an ideal piece for anyone who loves a handmade, casual look. This project is made using Aran-weight yarn, making it durable yet soft, great for everyday wear during cooler seasons.
Whether you’re a confident beginner ready to learn cables or an experienced knitter wanting a satisfying weekend project, this sweater will guide you through essential knitting techniques like shaping, ribbing, and working cables in panels.

Materials You’ll Need

Before starting, gather the following supplies:

Aran-weight yarn (approximately 5–7 balls, depending on size). Choose a denim-toned wool blend for that rugged, modern look.
Knitting needles: 4mm and 5mm pair
6 stitch markers
2 stitch holders
Tapestry needle for seaming and weaving in ends
Measuring tape and scissors

Tension (Gauge):
18 stitches and 24 rows = 10x10 cm (4x4 in) in stocking stitch using 5mm needles.
Always make a swatch before starting to ensure your gauge matches.

Step 1: Start with the Ribbed Hem

Begin by casting on the number of stitches for your chosen size. The bottom hem of this sweater uses a simple K2, P2 rib, which gives the edge stretch and structure.

Work in ribbing for about 8 cm (3 inches).
Make sure your edges are even and neat. This foundation sets the tone for the rest of the project.

Step 2: Knit the Back Panel

After finishing the ribbing, switch to larger needles and begin the main stitch pattern, which combines smooth knit sections with textured cables.
The pattern alternates between purl stitches and small cable panels.
You’ll be using two simple cable crosses: C4L (cross four left) and C4R (cross four right).
These create the traditional “rope” effect seen on classic fisherman-style sweaters.
Continue knitting in pattern until the piece measures around 42 cm (16.5 inches) from the cast-on edge.

Step 3: Shape the Raglan

To form the armholes, you’ll begin raglan shaping a gentle decrease at each edge that gives the sleeves their diagonal join.

Decrease two stitches at the start and end of every few rows.
Repeat these shaping rows until you have the correct number of stitches remaining for your size.

You’ll notice the shoulder lines slant inward as the shape forms; that’s the hallmark of a raglan sweater.

Step 4: Work the Front Panel

Knit the front piece just like the back until you reach the beginning of the raglan section.
When you reach the neckline area:

Divide your stitches for the neck opening.
Work each side separately, shaping the curved neckline while continuing the raglan decreases.
Use a stitch holder to save the center stitches — these will form the neckband later.

This shaping gives your sweater a flattering, comfortable fit without being too tight around the collar.

Step 5: Knit the Sleeves

Each sleeve begins with a ribbed cuff again, a K2, P2 ribbing about 8 cm long.
Then, switch to the larger needles and follow the central cable pattern that runs up the sleeve:

Increase one stitch at each side every few rows until you reach the full width.
Continue until the sleeve measures around 46–48 cm (18–19 inches) from the start.

Finish the top of each sleeve with the same raglan shaping as before to match the body pieces.

Step 6: Assemble the Sweater

Once you’ve completed the front, back, and sleeves, it’s time for finishing, the most satisfying part!

Block all pieces lightly on the wrong side to relax the stitches.
Sew the raglan seams together (attach sleeves to the body).
Join side and sleeve seams neatly using mattress stitch for an invisible finish.

Take your time with this step; clean seams make your handmade sweater look professional.

Step 7: Knit the Neckband

With the right side facing, use smaller needles to pick up stitches evenly around the neckline (including those on the holders).

Work in K2, P2 rib for about 20 rows to create a soft, fold-over collar.
Cast off loosely to ensure it stretches comfortably over the head.

Finally, fold the neckband to the inside and sew it in place for a smooth, polished finish.

Finishing Touches

Weave in all yarn ends securely.
Give your sweater a gentle steam or block according to the yarn’s care instructions.
Avoid heavy pressing. Just smooth out the fabric to bring out the texture of the cables.

Once dry, your denim-look sweater will be ready to wear — cozy, durable, and effortlessly stylish!

Tips for Success

Check your tension before you start. Small differences in gauge can change the final fit.
Use stitch markers to keep track of your cable sections.
Practice cable stitches on a small swatch first if you’re new to them.
Always measure as you go to ensure perfect length and sleeve shaping.

Conclusion

Knitting your own sweater is an incredibly rewarding experience. This denim-look cabled jumper offers a perfect mix of structure and comfort, ideal for casual weekends or as a thoughtful handmade gift. Once you finish, you’ll have a piece that’s not only warm and stylish but also made entirely by you.
If you love timeless knitting projects, add this sweater to your to-make list. It’s a cozy wardrobe essential that showcases your craftsmanship with every stitch.