Dani Triangle Bikini Top - Classic Bikini Top Sewing Pattern

• Sizes: XS, S, M, L, XL, XXL
• Skill Level: Intermediate — Straightforward construction with hidden seams and adjustable closures, but requires practice handling stretchy fabrics and slippery elastic. Perfect if you've sewn basics before and want a fun challenge!
• Seam Allowance: 1/4" (0.25") included
• Construction: Double-layered cups, hidden seams, serged/zig-zagged elastic, adjustable tie straps (no hardware needed)
• Skills You'll Practice: Serging/zig-zag stitching, working with 4-way stretch fabric, elastic application, channel creation with seam ripper, adjustable strap design

• A4 and US Letter PDF for at-home printing
• A0 PDF file for copyshop printing
• Layered PDF for easy size selection
• Step-by-step written instructions with detailed diagrams
• YouTube video tutorial: youtu.be/ycKUOQwtX0E

• Recommended Fabrics:

You'll need 0.5 meters (approximately 0.5 yards) of premium 4-way stretch swimwear fabric for all sizes. This fabric is essential — it won't work with regular knits or wovens because swimwear demands maximum recovery and durability.

Great fabric choices include: Lycra/spandex blends, nylon-spandex swimwear knits, chlorine-resistant swimwear fabrics, reversible two-tone combinations for versatile styling.

See the listing images for a full fabric requirements chart by size.

Tools Needed

• Sewing machine (essential)
• Serger (optional but highly recommended for professional elastic finishing)
• Seam ripper
• Stretch needles (70/10 or 80/12 size)
• Scissors or rotary cutter
• Loop turner or safety pin (for threading straps)

Notions

• Polyester thread
• Silicone/rubber swimwear elastic (chlorine-resistant)

• Hidden seams everywhere — seams are tucked inside the cup, creating a smooth, polished finish that looks store-bought
• Easy adjustability — three tie straps (2 neck ties + 1 underbust) let you customize the fit perfectly on any body
• Reversible option — use two different outer fabrics to create a totally reversible top (one coordinating look on each side!)
• Double-layered cups — provides support, opacity, and that premium feel without extra bulk
• Minimal pattern assembly — only 2-3 small tiles to tape together — quick and fuss-free
• Beginner-accessible construction — despite the intermediate skill rating, the hidden seam method is actually forgiving and hides mistakes beautifully

• PDF downloads are instantly available after checkout in your email

How to Print

A4 / US Letter (At-Home Printing)

Print on standard A4 or US Letter paper at 100% scale. Select "actual size" or "no scaling" in your printer settings. Make sure all resize or fit-to-page options are turned OFF — printing at any other scale will make the pieces the wrong size.

A0 (Copyshop Printing)

Take the A0 PDF file to a copy shop and request it printed on A0 paper at 100% scale. Make sure to tell them NOT to resize or scale to fit the paper.

Message me anytime — I'm happy to help you through any step of the sewing process!

NO RETURNS OR REFUNDS on digital purchases.

This pattern is for personal use only. You may sell finished items made from this pattern, but please do not distribute, share, or resell the pattern files.