Our wobble chairs are an alternative to traditional seating—giving kids a full range of movement and the stability they need to wobble without tipping over! Each of our chairs features a comfortable, contoured seat and a rounded, no-slip rubber base…plus, the durable plastic chairs’ unique design helps strengthen core muscles while encouraging proper posture. There are even built-in handles under the seats that make the chairs super-easy to pick up and move anywhere in the classroom! Seats measure 13" in diameter.