For Smaller Aircrafts such as Cessna 150, 152, Piper Cherokee, Warrior or similar Aircrafts. Our cushions differ from any other in the market for its Elevated Lumbar Support, a strap to attach it with aircraft , and the Back is 20" high. Also it is the only brand made of 1000 Denier Nylon Fabric and superior quality Foam. Seat Dimension: Depth (Back to Front): 15 Inches Width (Left to Right): 15 Inches Thickness: 2 Inches Back Support Dimension: Height - 20 Inches Width - 15 Inches Back Thickness – 2 Inches Lumbar Support Thickness – 2.75 Inches