It’s really hard to know what bra size you wear, let alone what size underwire you need.
Every company that makes bras and bra sewing patterns has their own sizing, some overlap, but often they don’t.
When viewing an underwire product page on our site you’ll notice a button along the side labeled “+ Technical Specs” – Clicking this link will display the exact measurements of the underwires.
This is what you’ll see:
If you are unsure how to get the Length, Depth, and Width use this as your guide.
The Length is measured around the curve from tip to tip. The Width is straight across from tip to tip. The Depth is measured from the center point of the Width to the bottom of the curve.
Happy Bra Making!