19mm wide
2 hook adjustment
Black

Bra back fasteners are available in various widths., and each one comes as a set containing two parts: - The hook side, and the eye side. The wider the fastener the more sets of hooks and eyes it will have to fasten it. However all sizes may have an adjustment, which is how long you can make the fastener if need, generally this adjustment is between 1 (no adjustment) and 4 rows of eyes.