BestTransfer Velour - Small, 17 x 14.5 Inches - 1 Each / Each - TS30640 - Unique inner surface of these continuous cushioned tubes allows them to glide in only one direction and resist sliding back in the opposite direction. This will help keep a patient correctly seated instead of sliding forward into a slouch position. Promotes good posture and maximizes comfort. Available with a Velour or Non-Slip surface. Specifications: Size: Small, Inches: 17 x 14.5, Centimeters: 43 x 37, Unit: ea Size: Medium, Inches: 18 x 18, Centimeters: 45 x 45, Unit: ea Size: Large, Inches: 31.5 x 23.5, Centimeters: 80 x 60, Unit: ea 1 Each / Each