Underwires are the semi-circular boundaries around the cup of a bra. These underwires utilize a different sizing than my traditional regular wires.
When can you wear underwire bra after breast augmentation? - Power
Bra Cup Shaped Stereotyped Plastic Silicone Bone Soft Underwire
Warners Womens Flex Revolution™ 2-ply Underwire Bra : : Clothing, Shoes & Accessories
Wired Bras / Underwire Buying Guide & FAQ, Glamorise Bras
WonderBra EcoPure Minimizer Bra
Bra accessory Bra plastic underwire
List of Lingerie Fabrics and Acessories -Jingsourcing
Olga Flex Revolution Plastic Underwire 2-Ply Bra GK2941A
Plastic Loose Leaf Rings 6holes Binding Book Rings Ring - Temu Canada