Sew a cozy sweatshirt this fall for FREE!

Get your Free Pattern

Introducing the Opal Sewing Pattern

Get the best fabric recommendations, fitting tutorials, and styling ideas for this feminine blouson cardigan.

Posted in: Sewing Patterns • October 1, 2026



Woman modeling cream Opal cardigan


Woman modeling pink Opal cardigan

Opal is a blouson cardigan that brings a little structure to the softness of a knit layer. Slightly oversized through the bust and sleeves, the relaxed silhouette attaches to a fitted waistband that sits at the natural waist, creating an easy contrast between volume and definition. The result is a cardigan that feels cozy and relaxed while still giving your outfit a considered, feminine shape.

Opal cardigan moodboard

The cut-on dolman sleeves add to Opal's relaxed feel, flowing naturally from the bodice without a separate shoulder seam. A high, round neckline keeps the upper silhouette clean and classic, while fitted cuffs add a touch of structure to the sleeves.

Thoughtful finishing details give Opal a polished feel from the inside out. A facing neatly finishes the neckline and center front, creating a clean edge that complements the simple silhouette. The fitted waistband sits right at the waist, making Opal especially easy to pair with high-waisted bottoms or layer over dresses and skirts.

Fabric and Fit



Model wearing a cream Opal cardigan


Model wearing a pink Opal cardigan

Opal is designed for knit fabrics with good recovery. Look for medium-weight knits such as French terry, ponte, sweater knits, rib knits, double knits, or stable jersey. Fabrics with a little more body will help the blouson shape hold its volume, while softer knits will create a more relaxed, drapey silhouette.

Because Opal is intentionally oversized through the bust and sleeves, choosing a fabric that complements the desired amount of volume can make a big difference in the finished look. A structured knit will give you a more defined, polished cardigan, while a softer knit will emphasize the easy, slouchy quality of the design.



Opal cardigan on Dani, front view


Opal cardigan on Dani, back view

Dani is wearing the Opal cardigan in a size 2. We added 1" to both the body and sleeve lengths. Her measurements are bust: 34 1/2" (87.6 cm), waist: 27" (68.6 cm), hip: 37 1/2" (95.3 cm), and she is 5'9" (175.3 cm) tall.



Opal cardigan on Franki, front view


Opal cardigan on Franki, back view

Franki is wearing the Opal cardigan in a size 22. We added 3/4" to the body and reduced the sleeve length by 1". Her measurements are bust: 50 1/4" (127.6 cm), waist: 44" (111.8 cm), hip: 54 1/4" (137.8 cm), and she is 5'6 1/2" (168.9 cm) tall.

Fitting Tips

Models wearing Opal cardigans

Opal is designed with a relaxed fit through the bust and sleeves and a fitted waistband at the natural waist. When choosing a size, pay particular attention to the waistband measurement. Adjust the length of the sleeve and body to ensure an intentional fit.

Related Articles
How to Sew a Cardigan: A Complete Step-by-Step Guide for Beginners
Master the art of sewing knit cardigans with this detailed tutorial that takes you from fabric selection to finished garment in just a few hours.
Pattern Hackers: Add Side Ties to a Cardigan
Break the rules with three pattern hacks for the Flor cardigan, by Chelsea Miller.
20 Creative Ways to Transform Your Spring Cardigan from Basic to Beautiful
Turn any cardigan pattern into a statement piece with these designer-inspired modifications that range from simple swaps to showstopper upgrades.
The Best Way To Sew a Button
The easiest way to sew buttons by hand and machine.

Join the Snippets Newsletter

And Get the Hansie Woven T-Shirt Pattern for Free!

(Plus a new free pattern every season.)

Get these free patterns instantly when you join over 300,000 readers who get clever sewing ideas in their inbox each week.

Want to comment on this article?

Sign in or become a Seamwork member to comment on this article.

Sign in            Learn More