These Super Comfort Wrap-Around Iron Pads are the only pads on the market that wrap around the irons to stay firmly in place. Jointed stirrup riders must order 1 (one) size smaller than the actual stirrup size (ex. 4 3/4" stirrup user needs to order 4 1/2" Super Comfort Iron Pad). To find the correct size of your stirrup, measure the base from left to right. The Super Comfort Iron Pads are virtually indestructable patented rubber pads.