20 mm wide and hooks onto your existing fasteners, crosses at the back as illustrated then fastens at the front. So easy to use. Adjustable length so one size fits all. The colour might be slight different on your screen because of the lighting effect.

Adjustable Low Back Converter Bra Extension Shoulder Strap Converter Accessories Extender Bra For Wedding Dress With Open Back - AliExpress

Low Back Backless Bra Strap Adapter Converter Fully Adjustable Extender Hook New Strap Only, Wish

2 or 3 Hook Low Back Bra Converter by Perfection, Black, Other

Low Back Backless Bra Strap Adapter For Women Adjustable Hook, Black/Nude/White, Drop Shipping From Jessie06, $0.45

Please kindly noted that this item is sold by Win Xinfeng from Joybuy marketplace.Features:, 100% brand new and high quality., Material: Cotton Blend,