There are two patterns- use the links to see size charts:
Baby Sizes: https://thehomeeclady.etsy.com/listing/4314640559/baby-bubble-romper-sewing-pattern-12-9
Doll Sizes: https://thehomeeclady.etsy.com/listing/4314649223/doll-bubble-romper-sewing-pattern-3
https://www.etsy.com/shop/TheHomeEcLady
