Sizes and Weights. Small 4kilos / 9Lbs 300mm / 12 Inches 500mm / 19.5 Inches. Medium 15 kilos / 34Lbs 500mm / 19.5 Inches 800mm / 31.5 Inches. Large 34kilos / 75Lbs 700mm / 27.5 Inches 1200mm / 47 Inches. All large frames are supplied fitted with the Boyer hanging system.