SIZE LENGTH WEIGHT
SMALL 0 - 6 months 23" - 28" / 58 cm - 71 cm 10 - 18 lb / 4 - 8 kg
MEDIUM 6 - 12 months 26" - 31" / 66 cm - 79 cm 15 - 24 lb / 7 - 11 kg
LARGE 12 - 18 months 30" - 34" / 76 cm - 86 cm 22 - 28 lb / 10 - 13 kg