November 11, 2026
Baby Clothes Size Guide: NB vs 0–3M (and When to Size Up All the Way to 5T)
Confused by NB, 0–3M, 3M, 24M and 2T? Our parent-friendly baby and toddler size guide explains what the labels mean, when to size up, and how to buy the next size secondhand.
- size guide
- baby clothes
- toddler clothes
- newborn
- parenting tips