Long Sleeve Baby Onesie Size Chart
Baby Onesie flat garment measurements (in).
Double the chest width for the total. Compare to another garment or to personal measurements.
| Chest Width | Length (Center Back to Snap Hem) | |
| 3/6 Month | 8" | 15 1/2" |
| 6/12 Month | 8 3/4" | 16 1/2" |
| 12/18 Month | 9 1/2" | 17 1/2" |
| 18/24 Month | 10 1/4" | 18" |
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