Croft Mill

Megan Nielsen - Cottesloe Swimsuit & Bikini Pattern (Sizes 0-20)

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Difficulty: Confident Beginner

Sizes: 0-20 (approx. UK 6-20 based on our size chart)

Please always check the pattern size chart and finished garment measurements.


Introducing the Cottesloe Swimsuit Pattern by Megan Nielsen, your go-to pattern for creating classic one-piece swimsuits and mix-and-match bikini sets. This pattern is perfect for those who desire both style and functionality, with its athletic elements and versatile design options.

With four variations to choose from, you have the freedom to create the swimwear that suits your preferences. View A features a one-piece swimsuit with a low scoop back, complete with a shelf bra and charming ties at the back. For those seeking a more modest look, View B offers a one-piece swimsuit with a high scoop back.

If you prefer the versatility of a bikini, View C presents a stylish bikini top paired with a low-rise bikini bottom. For a sporty and on-trend option, View D showcases an athletic-inspired bikini top matched with a high-waisted bikini bottom, complete with a wide waistband.

No matter which variation you choose, rest assured that all versions can be fully lined for added comfort and durability. The pattern includes detailed instructions to guide you through swimsuit construction techniques, ensuring a seamless sewing experience.

With the Cottesloe Swimsuit Pattern, you have the power to create swimwear that not only fits your body perfectly but also reflects your personal style. Dive into the world of swimwear sewing and enjoy the freedom of designing your own classic and versatile pieces.

Recommended fabric

Swimwear fabric with at least 50% stretch and good recovery, such as polyamide or Lycra.

Lining (optional for View A shelf bra): Powermesh


  • 6 mm (1/4″) wide swim elastic
  • 13 mm (1/2″) wide swim elastic
  • 25 mm (1″) wide swim elastic
  • Foam cups (optional)

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