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| 6 7/8 | 7 | 7 1/8 | 7 1/4 | 7 3/8 | 7 1/2 | 7 5/8 | 7 3/4 | 7 7/8 | 8 | 8 1/8 | 9 | ||
| Head Circumference | cm | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 61.5 | 62.5 | 63.5 | 66.5 | 66.5 |
| 6 7/8 | 7 | 7 1/8 | 7 1/4 | 7 3/8 | 7 1/2 | 7 5/8 | 7 3/4 | 7 7/8 | 8 | 8 1/8 | 9 | ||
| Head Circumference | cm | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 61.5 | 62.5 | 63.5 | 66.5 | 66.5 |