Zippy Size Chart
| Size | Height | Weight |
| Preemie | Up to 18" | Under 8 LBS |
| Newborn | 18-22" | 8-12 LBS |
| 0-3M | 21-25" | 12-15 LBS |
| 3-6M | 24-27" | 15-18 LBS |
| 6-12M | 26-30" | 18-22 LBS |
| 12-18M | 29-32" | 22-26 LBS |
| 18-24M | 31-34" | 26-30 LBS |
| 2T | 33-36" | 30-32 LBS |
| 3T | 36-39" | 32-35 LBS |
| Size | Height | Weight |
| Preemie | Up to 18" | Under 8 LBS |
| Newborn | 18-22" | 8-12 LBS |
| 0-3M | 21-25" | 12-15 LBS |
| 3-6M | 24-27" | 15-18 LBS |
| 6-12M | 26-30" | 18-22 LBS |
| 12-18M | 29-32" | 22-26 LBS |
| 18-24M | 31-34" | 26-30 LBS |
| 2T | 33-36" | 30-32 LBS |
| 3T | 36-39" | 32-35 LBS |