Big Mouth Monster Onesie Size
| Size | Height (cm) | Recommended Weight (kg) | Recommended Weight (lbs) |
| S | 150 - 155 cm | 40 - 50 kg | 88 - 110 lbs |
| M | 155 - 165 cm | 50 - 65 kg | 110 - 143 lbs |
| L | 165 - 175 cm | 65 - 80 kg | 143 - 176 lbs |
| XL | 175 - 185 cm | 80 - 90 kg | 176 - 198 lbs |