Eight sizes are included in the set Â½â€-1 Â½â€ -These loop irons are used for shaping sewn loops of harness parts. -Theses loops are 3/16â€ thick on the Â½â€, 5/8â€, Â¾â€. -Size 7/8â€ and larger are Â¼â€ thick. -Can be brought separate or as a set. -1 Â¾â€, 2â€ are also available.