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| Size | Small | Medium | Large |
| Height | under 5' (152cm) | 5'-6' (152-183cm) | above 6' (183cm) |
| Mouth size | Small mouth, children | Average mouth | Large mouth |
| Typical age | +7 years | +10 years | +13 years |
| Use with braces | No | Yes | Yes |
Size Guide for Next Generation Aero Mouthguard by Sisu
