Onesies:
Newborn 5-8lbs, 17-21 inches
0-3mos 8-12lbs, 21-24 inches
3-6 mos 12-16lbs, 24-26 inches
6-9mos  16-20lbs, 26-28 inches
12mos   20-24lbs, 28-30inches
18mos  24-28lbs, 30-32 inches
24mos  28-32lbs, 32-34 inches

Tshirt:
2/3T
4/5T

Youth sizes also available from XS TO XL

*** size disclaimer***
We use Gerber Onesies. These tend to run on the smaller end of sizing so please go UP a size if you are unsure of the fit. Exchanges based on incorrect size choice will incur a shipping fee of $3 in addition to sending it to us. NO returns or exchanges on personalized items....if there are any problems with personalized items, reach out to us and we will rectify the issue as best we can.