Grand Prix Knitwear Size Chart
| GP Size | US Size | Chest | Waist |
| YS | 5 - 7 | 23" - 27" | 21" - 23" |
| YM | 8 - 10 | 27" - 30" | 23" - 25" |
| YL | 11 - 12 | 30" - 32" | 25" - 27" |
| Adult | |||
| XS/S | 0 - 4 | 32" - 34" | 27" - 29" |
| M/L | 6 - 8 | 34" - 36" | 29" - 31" |
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Catalog
| GP Size | US Size | Chest | Waist |
| YS | 5 - 7 | 23" - 27" | 21" - 23" |
| YM | 8 - 10 | 27" - 30" | 23" - 25" |
| YL | 11 - 12 | 30" - 32" | 25" - 27" |
| Adult | |||
| XS/S | 0 - 4 | 32" - 34" | 27" - 29" |
| M/L | 6 - 8 | 34" - 36" | 29" - 31" |