Yeah and on the site, they mention because of the rubber around the joints in these, you should add another 1/2" but something tells me ordering a 5" would just be too large for me... Jointed Stirrup Irons Pair - Statelinetack.com
An innovative iron designed to provide maximum flexibility with better shock absorption. Unique stainless steel spring construction in stirrup arms cushion each and every downward contact to ease movements in the rider's knees and the horse's back. Stirrup foot offers extremely smooth forward and backward movement for optimum comfort and safety and to keep the rider's heels down in the correct position. Includes grey rubber grip pads and joint coverings, which won't attract attention to leg movement in the arena like white will. Imported. Sold in Pairs. Sizing Information
: To determine your size, measure across the ball of your boot and add ½".The rubber on both sides will decrease the area available for your foot to fit, so you may need to go up approx. ½" from the size of regular stirrups.