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wearable-blanket
size age height weight
NB 0 to 3 months 19 to 23 inches 6 to 12 lbs
S 0 to 6 months 23 to 26 inches 10 to 18 lbs
M 6 to 12 months 26 to 30 inches 16 to 24 lbs
L 12 to 18 months 30 to 35 inches 22 to 28 lbs
XL 18 to 24 months 35 to 40 inches 22 to 28 lbs
2T-3T 24 to 36 months 34 to 40 inches 25 to 40 lbs

All sizes in inches unless otherwise noted.