Sewing Pattern Diane Tank Swimsuit by Jalie

Make a flattering one-piece swimsuit with a scoop neck, supportive details, and a fit designed for women, girls, and plus sizes. The Diane Tank Swimsuit sewing pattern includes a keyhole back that helps hold the straps in place, plus a fun inset that makes adjustments easier as you sew. It is a versatile swimwear project for confident home sewists looking to create a custom suit for pool days, beach trips, or swim lessons.

Instructions to sew in supportive soft cups are included, and the front is fully lined for a comfortable finish. Lining in the back is optional, with the pattern notes recommending it for adults and saying it is not needed for kids. An optional mesh waist tie can be attached in the front or back for a more feminine look.

• One-piece swimsuit sewing pattern
• Scoop neck with keyhole back
• Supportive soft cup instructions included
• Front fully lined
• Optional back lining recommended for adults
• Optional mesh waist tie for front or back placement
• 27 sizes included: women's, girl's, and plus sizes
• Fabric recommendation: swimwear fabric with 60% stretch in the length and across the width

This pattern is a great choice for sewists making custom swimwear with a polished fit and practical support details. Pair it with your favorite swim knit, lining, and elastic for a suit that is ready for active poolside wear, family vacations, and everyday swim practice.