Innovative 3D protected pockets - Exclusive shock absorbent convex molding protects pocket's contents Superior wheel control – Constant design & testing ensures the performance of our wheels lead the industry. Unique base structure – Specially developed base platform provides additional strength and stability. Small Case: Overall Dimensions: 22 x 14 x 8.9” + 2” Exp , Case Dimensions: 18.7 x 13.8 x 8.9” + 2” Exp, 6.08 lbs Medium Case: Overall Dimensions: 28 x 17.7 x 11” + 2.8” Exp , Case Dimensions: 25 x 16.9 x 11” + 2.8” Exp, 7.5 lbs