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Learn to Sew a Bralette

Discover the art of lingerie making in this empowering online sewing class featuring the Robin Bralette pattern. Learn professional techniques for creating a comfortable, fitted soft bra with princess seams and adjustable straps. Master working with delicate materials and elastic while creating a self-lined bralette with picot elastic finishing. Perfect for sewists ready to explore intimate apparel, this class teaches you to create custom-fitted undergarments with a professional finish.

Free for all Seamwork members!
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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)

Learn to Sew a Bralette

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).

Work alongside other sewists by participating in the Seamwork community. Ask and answer questions, share your progress, get inspired by real-life sewists, and post your finished projects.

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