| T Shirt Size | Chest | Weight | Generic Age Range |
| 6 mos | 19″ | up to 16 lbs. | 3-6 mos. |
| 12 mos | 21″ | 16 – 20 lbs. | 7-12 mos. |
| 18 mos | 22″ | 21 – 24 lbs. | 13-18 mos. |
| 24 mos | 23″ | 25 – 27 lbs. | 19-24 mos. |
| 2T | 24″ | 25 – 27 lbs. | 2 years |
| 3T | 25″ | 28 – 32 lbs. | 3 years |
| 4T | 26″ | 33 – 36 lbs. | 4 years |
| XS Youth | 26″ | 36 – 42 lbs. | 4-5 years |
| S Youth | 28″ | 43 – 55 lbs. | 6-8 years |
| M Youth | 30″ | 56 – 73 lbs. | 9-12 years |
| L Youth | 32″ | 74 – 100 lbs. | 13-16 years |