Size Guidelines:
The manufacturers recommended sizes are as follows; all sizes are approximate.
- 3 - 6 months: 12 - 17 lbs or 3-5 kg
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6 - 12 months: 18 - 22 lbs or 6-9 kg
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12 - 18 months: 23 - 27 lbs or 10-11 kg
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18 - 24 months: 28-30 lbs or 12 - 13 kg
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2T: 31-34 lbs or 14-15 kg
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4T: 35-41 lbs or 16 -19 kg
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6T: 42-47 lbs or 20-21 kg
All of the onesies stretch widthwise very well, yet if you have a long baby or tall toddler, be on the safe side and order one size up. The toddler shirts shrink a bit, so order one size up.