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Robin Bra Sewalong

Sewing underthings is empowering! Learn how to create your own bra in this class.

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Size & Fitting

Drop what you think you know about your bra and cup size and dive into the size chart. In this lesson, Haley will walk you through selecting a size and adding or reducing fullness, if you need to. Remember, making a muslin is key to getting the best fit!

If you need any help selecting your size or making adjustments, be sure to share in the Community.

Click the timestamps to skip to these sections:


  • How to use the size chart to select a size (00:22)

  • Prepare your pattern pieces (02:26)

  • Add fullness (05:12)

  • Reduce fullness (05:26)

Robin Bra Sewalong

Here’s what you’ll need for this project:


  • Robin bra pattern

  • Light to medium weight knits with four-way stretch with 50% stretch and good recovery

  • All-purpose polyester sewing thread

  • Ballpoint sewing machine needle

  • Four 1/2” (13 mm) rings and two sliders

  • 1 1/2 yards (1.4 meters) 1/2” (13 mm) of wide bra strapping

  • 1 1/2 yards (1.4 meters) of 3/8” (10 mm) picot elastic

  • 1 yard (.9 meters) of 3/4” picot elastic (20 mm) (sizes 00 - 16) or 1” (2.5 cm) picot elastic (sizes 12 - 26)

  • One hook and eye bra closure. Sizes 00-16: 3 hook closure finishing at 2 1/4” (5.7 cm). Sizes 12-26: 4 hook closure finishing at 3” (10.2 cm).

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