Size
Age
Weight
Small / Medium
3–6 months
13–22 lbs. / 6–10 kg
Large
6–15 months
20–26 lbs. / 9–12 kg
Extra Large
1–2 years
24–31 lbs. / 11–14 kg
Super Large / Junior
2–4 years
31–44 lbs. / 14-20 kg