LowBack: Extra Extra Small – Height: 240 mm / Waist size: 400-650 mm / Recommended user weight: 12-17 kg|LowBack: Extra Small – Height: 260 mm / Waist size: 600-800 mm / Recommended user weight: 17-25 kg|LowBack: Small – Height: 280 mm / Waist size: 700-950 mm / Recommended user weight: 25-50 kg|LowBack: Medium – Height (mm): 300 mm / Waist size (mm): 850-1100 mm / Recommended user weight: 45-95 kg|LowBack: Large – Height: 310 mm / Waist size: 1000-1250 mm / Recommended user weight: 90-165 kg|LowBack: Extra Large – Height: 320 mm / Waist size: 1200-1400 mm / Recommended user weight: 160-240 kg|LowBack: Extra Extra Large – Height: 330 mm / Waist size: 1350-1600 mm / Recommended user weight: 230-300 kg|HighBack: Extra Extra Small – Height: 600 mm / Waist size: 400-650 mm / Recommended user weight: 12-17 kg|HighBack: Extra Small – Height: 660 mm / Waist size: 600-800 mm / Recommended user weight: 17-25 kg|HighBack: Small – Height: 760 mm / Waist size: 700-950 mm / Recommended user weight: 25-50 kg|HighBack: Medium – Height: 820 mm / Waist size: 850-1100 mm / Recommended user weight: 45-95 kg|HighBack: Large – Height: 890 mm / Waist size: 1000-1250 mm / Recommended user weight: 90-165 kg|HighBack: Extra Large – Height: 970 mm / Waist size: 1200-1400 mm / Recommended user weight: 160-240 kg|HighBack: Extra Extra Large – Height: 1030 mm / Waist size: 1350-1600 mm / Recommended user weight: 230-300 kg|Maximum user weight: 300 kg