No. 3109

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Pattern Description

The Crosby swimsuit is the ultimate feel-good swimsuit, with a surplice bodice, shirring at the side seams, a supportive shelf bra with optional foam cups, cute convertible straps at the back, and just the right amount of coverage, without sacrificing style.

Sew it up in swimwear fabrics that have 4-way stretch, and don’t forget the swimwear elastic.

Seamwork Issue 55


Sizes and Supplies

0 - 26

All-purpose polyester sewing thread, ballpoint needle, ballpoint twin needle, 1/4" swimwear elastic (Misses: 5 1/4 - 6 5/8 yards (4.8 - 6.1 meters). Curvy: 6 7/8 - 7 7/8 yards (6.3 - 7.1 meters)), 3/4" swimwear elastic (Misses: 1/2 yards (.5 meters). Curvy: 3/4 yards (.75 meters)). Optional: 2 molded foam bra cups and loop turner or bodkin.

Nylon Lycra swimwear fabrics with 4-way stretch and 60% - 80% stretch. Fabrics with 2-way stretch will not work for this pattern.

Swimwear lining fabric with 4-way stretch and 60% - 80% stretch. Lining fabrics with 2-way stretch will not work for this pattern.

Imperial Measurement Chart      
Metric Measurement Chart
Download Information

48-60 pages

Pattern Fit

We want to help you achieve the best fit possible so you can sew garments you truly love. That is why we create fit guides for every pattern. Our fit guides are designed to help you better understand the fit and details of each pattern. Use fit guides in conjunction with the finished measurement chart to better understand the ease and intended fit of each pattern.

View Fit Guide

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Techniques and customization ideas for your Crosby

Learn how to shop for swimwear fabrics and lining.

Make athletic wear at home that will perform with your body.

How to sew swimwear.