Hook and eyes are used to fasten up your bra mainly in the back of bras. Hook and eyes sets come in two pieces hooks which consist of one row of hooks varying from one, two, three, four, five, six, or a continuous piece. The size of hook and eyes refer to the hight. The eyes come with either one, two, three or four sets of rows. The pieces are sealed round three of the edges, the fourth edge is left open so you can put your bra back fabric between them, to sew to complete your bra fastening. The continuous hook and eye set will need sewing round two extra edges to help stop the closure from looking aged with washing.
What size hook and eye to use will depend on your size and the pattern requirements.
Front fastened bras use either use clips, hook and eye.
Short open ended zips can be used on sports bras.