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Costume Construction

Bra Fitting for Cosplay — The Foundation Layer

The right foundation garment is invisible and makes everything else work.

Why It Matters

The fit of your finished costume depends, in significant part, on what's underneath it. A costume bodice fitted over the wrong bra will fit differently on the day when you're wearing a different one. A costume fitted without any bra will gap or pull when worn with one. Getting the foundation right at the start — wearing exactly what you'll wear under the costume for every fitting — is one of the most important and most overlooked aspects of costume construction.

Getting the Right Bra Size

Most people wear the wrong bra size. A professional bra fitting (available free at many lingerie retailers) reveals your correct size, which for most people differs from what they currently wear. For costume purposes, what matters is finding a bra that provides the support and shape your costume requires — whether that's a minimiser, a strapless, a long-line, or a custom-built internal structure in the costume itself.

Built-In Support

Many of Heidi's costume designs include built-in support — structured boning, internal corset elements, or foam padding — that eliminates the need for an external bra. This is particularly relevant for strapless or off-shoulder designs where an external bra would be visible. The Jessica Rabbit build is a good example: the internal structure provides genuine support independently of any undergarments.

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