High quality aluminum stirrups with rubber grip tread and spring loaded outside release for safety. When pressure is applied to outside of stirrup like in a fall the side of the stirrup will open all the way up allowing the foot to be released. No way to get hung up in these stirrups. Available in youth and adult sizes for any age rider. The easy way out of a bad situation! Small size (4 3/4" x 4 1/4" inside measurement, 6 1/8" outside height, 3" x 1 1/4" tread, .7 lbs.) Choose 2 1/2" or 3" Neck size.