Well’s Bay Bikini

Halfmoon Atelier


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Buy the Well’s Bay Bikini sewing pattern from Halfmoon Atelier. This reversible bikini is strikingly minimal yet versatile.

Living in a hard-to-reach area, Meghann Halfmoon originally designed this bikini to use the stretch of strips of swimwear fabric – “elast-ish” – rather than special elastics or other notions (although elastic can be used). The wireless top has under-bust darts, thin shoulder straps and ties at the back. The bottoms are low-rise hipsters that provide full coverage, thanks to the curved seam of the side panels. Ideal for the minimalist who cannot choose, the reversibility gives you four different wearable combinations and plenty of opportunity for colour-blocking. (The pattern comes with bonus tips for creating panties with the bikini bottoms pattern!)

This sewing pattern is available to buy in the following formats:

– PDF (available to download immediately after purchase). What is a PDF?

– PDF pattern + Printed A0 copy shop (We print out the A0 pattern sheets, but you’ll need to download the digital instructions, as we don’t print these. The PDF files will be emailed immediately after purchase, and the A0 pattern sheets will be dispatched next working day). What is Copy Shop?

Suggested fabrics: Medium weight, 4-way stretch swimwear fabric with approx. 40% – 65% horizontal stretch and 25% – 50% cross grain stretch. Swimwear fabric typically contains 80% – 90% nylon or polyester and 10% – 20% elastane (i.e. Spandex, Lycra).

Fabric requirements: All sizes require a total of 1 m (or 1 yd) of fabric, split between two different colours or prints. The instructions use a solid on one side, and a print on the other for clarity.

Sizing: 1 – 10 (approx. UK 6 – 20). Please check the size chart for body measurements.

Notions: Coordinating thread (polyester, stretch or wooly nylon); stretch sewing machine needle; hand-sewing needle // Optional: 1/4″ to 3/8″ swimwear elastic (this may provide more support); foam cups.

PDF pattern includes: This is a computer drafted, print and cut PDF pattern, printable in black/white or colour. Print-at-home and A0 copy shop files are included in your purchase. The pattern includes all sizes, but the size views can be easily toggled on or off in order to print only the size you want to make. Step-by-step, illustrated instructions provide extensive detail on bust adjustments and using the burrito method (including a video).

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Additional information


Lycra / Spandex / Waterproof

Make time

Half a day

Sewing level

Confident Beginner, Intermediate


UK 6 / US 2 / EU 34, UK 8 / US 4 / EU 36, UK 10 / US 6 / EU 38, UK 12 / US 8 / EU 40, UK 14 / US 10 / EU 42, UK 16 / US 12 / EU 44, UK 18 / US 14 / EU 46, UK 20 / US 16 / EU 48

PDF Printing

10 pages

Pattern format

PDF, PDF pattern + Printed copy shop (+£7.00)

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