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Small: Weight- 5-12lbs Length- 9-12 in. Thickness- 1/2 in
Medium: Weight-12–30 lbs Length-10.5-13.5 in Thickness-5/8 in
Large: Weight- 35 lbs Length-13.5-18.5 in Thickness-7/8 in
Extra Large- Weight-40 + Length-19-27 in Thickness- 1 in