1. Air Stability Wobble Cushion, Blue, 35cm/14in Diameter, Balance Disc, Pump Included (Click Link to Check Price on Amazon)
Editor's Rating : 9.6 out of 10
14in/35cm in diameter, large spiky dimples on one side (for standing), very small dimples on the reverse side (for sitting).Free 8-inch hand pump included for easy inflation. Cushion is delivered deflated. No instructional DVD. Presented in a nice COLOR box.

2. j/fit Balance Wobble Disc Extra Large 24" | Durable Inflatable Cushion Pad | Ideal For Core Balance and Strength, Stability, Fitness Exercises, Chairs, Ankle Rehab and Pets | Inflation Straw Included (Click Link to Check Price on Amazon)
Editor's Rating : 9.8 out of 10
FIND STABILITY WITH A J/FIT BALANCE DISC: Ameliorate your stability and find coordination while using our superior balance discs. Improve core strength and soothe ankle related pains all at once.ANTI-BURST CORE BALANCE DISC: All of our core balance discs are designed from high quality materials so as to last for the many years to come. Their anti-burst nature can withstand up to 450 lbs.

3. Jr. Inflatable Seat Cushion with Pump, 31cm/12in Diameter for Kids, Blue (Click Link to Check Price on Amazon)
Editor's Rating : 9.4 out of 10
12in/31cm in diameter for kids, small round dimples on one side for active sitting and even surface on the reverse side for increased comfort. Suitable for children to use in kindergartens and elementary schools. Recommended for ages 3 to 13.One free hand pump included for easy adjustment of cushion firmness to desired level. Good for active sitting, helps promote better posture, improve balance & coordination.

4. Therapist's Choice® Inflated Air-Filled Stability Balance Disc (Click Link to Check Price on Amazon)
Editor's Rating : 8.9 out of 10
Therapist's Choice® Pre-Inflated Air-Filled Stability / Balance Disc13 1/2" diameter x 2 1/2" Height, Color=Light Blue (Aqua Blueish)

5. Wobble Cushion by Vive - Inflatable Balance Disc - Fitness Trainer Wobble Pad for Rehab, Exercise, Isokinetics, Physical Therapy & Stability - Vive Guarantee (Click Link to Check Price on Amazon)
Editor's Rating : 9.9 out of 10
STABILITY PROMOTION: Disc is designed to wobble slightly during use, encouraging better posture and helping to increase stability and balance. 440 lb weight limit (Latex free)STRENGTHENING: Improves muscle performance and tone by involving core, back, and leg muscles.