Chest measurements:

Newborn: 14.5
3 months: 17
6 months: 18
12-18 months: 19
18-24 months: 20
2-3 years: 21

Inseam and rise are customizable, however standards are given within the pattern, there will also be an optional simple shrug pattern that goes with this. This is a Ballet cut style collared romper.