Closet Core Patterns
Sophie Swimsuit Pattern
This is a PDF pattern: you will receive an email with the digital files. If you select printed we will print the pattern for you.
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Description
With curvy seam lines and a 3-piece balconette cup, Sophie is a supportive, infinitely customizable swimsuit with tons of style.
View A is a classic one-piece with a curved shape and elastic straps. View B gives you the option of a bikini top with a halter neck and a high-waisted bikini bottom with full cheek coverage. Tap into your inner designer by playing with contrast fabric and colour blocking, and learn how to add optional underwires and foam cups to make the most supportive swimsuit ever!
Share on social with the hashtag #ClosetCoreSophie
Fabric requirements
Yardage
58" / 1.5 m wide
- FABRIC ALL VIEWS ~ Sizes 0-20 = 1 yd (1 m)
- LINING ALL VIEWS ~ Sizes 0-20 = 0.75 yd (0.7 m)
Suggested fabric type
- Body: Swimsuit lycra with 4-way stretch (at least 50% crosswise stretch)
- Lining: Swim lining with 4-way stretch (100% nylon suggested)
Supplies required
- 1/4yd (0.22m) bra cup foam for cups (suggested but optional)
- Underwire (suggested but optional) 1yd (.9m) of underwire channelling (suggested but optional)
- 1/2 yd (.5m) clear elastic for cups sewn without foam
- Stretch needles (important to avoid skipped stitches)
- 3/8” rubber or “swimwear” elastic (3.5 yds for swimsuit, 5 yds for bikini)
- Polyester thread 1 x 1" S-hooks or 1" swim closure (bikini top only)
- 4 x 3/8" S-hooks for swim straps, View A
- Small piece of bra lining for bridge stabilization
- Power mesh for center front of View A (optional)
- Measuring tape
- Chalk pencil or other marking tool
Video tutorials
View all sewing tutorials, videos and blog posts about this pattern here.
What's included
- Detailed instructions in English and French
- A0 PDF file: 1 page
- A4 PDF file: 12 - 15 pages
Sewing level
Challenging

