| Preemie | up to-5 lbs/2 kg |
| 1 Month | up to 8 lbs/4 kg |
| 3 Months | 8-12 lbs/4-5.5 kg |
| 6 Months | 12-16 lbs/5.5-7 kg |
| 9 Months | 16-20 lbs/7-9 kg |
| 12 Months | 20-23 lbs/9-10.5 kg |
| 18 Months | 23-27 lbs/10.5-12 kg |
| 24 Months | 27-31 lbs/12-14 kg |
| Small | 22-29 lbs/10-13 kg |
| Medium | 29-33 lbs/13-15 kg |
| Large | 33-38 lbs/15-17 kg |
| X-Large | 38-44 lbs/17-20 kg |
| XX-Large | 44-50 lbs/20-23 kg |
| Preemie |
2-4 lbs/1-2 kg |
| Infant |
10-22 lbs/4-10 kg |
| Toddler | 22-45 lbs/10-20 kg |
|
Small |
6-14 lbs/3-6 kg |
| Medium |
14-25 lbs/6-11 kg |
| Large | 25-40 lbs/11-18 kg |
| X-Large | 40-50 lbs/18-23 kg |
|
Small |
5/6 |
| Medium |
7/8 |
| Large | 9/10 |
| X-Large | 11/12 |
