Whether you are sewing an underwire bra or a swimsuit that requires an underwire it is important that you know your underwire size.
Underwire Sizing Charts
Size chart for bras - Miss Mary of Sweden
Underwire Sizing – Bra Builders
Bra Fitting Guide
How to Determine Bra Size, Bra Fitting
How to measure your bra size: Expert tips and brands we reviewed
Fit for Me by Fruit of the Loom Women's Unlined Underwire Bra, Style FT967, Sizes 38D to 42H
Bra Making 101
Kevana West
Continuous Monowire by Madalynne Intimates + Lingerie