Wiggle Stool, 12-18 Inch Height, YellowFeaturing an adjustable seat height of 12 18" in 2" increments, these wiggle stools grow with your students and eliminate guesswork when ordering. An extra thick padded seat allows for comfortable all day use. The tamper proof adjustable height reduces distractions and help promote a focused environment. The rubberized non skid base is angled for improved posture and provides stability, even when over tipped. Soft, extra thick cushion provides comfort