MEASURING YOUR BABY - OR "Belly Button to Butt Crack"
1) Soft measuring tape
2) Typical diaper ON your baby- to know if the items will fit, you need to have your typical diaper on your baby. If you want the cover for nights, PUT the night time diaper on.
3) Relatively Compliant baby - good luck on that one.
To measure your baby's thighs: Measure around the meatiest part of the baby's thigh. This is very important to know when buying a cover!
To measure your baby's rise: Measure from mid-back at the waistline (aka just above the butt-crack) to slightly below his belly-button (where the diaper hits).
To measure your baby's hips: Measure at the fullest part of the hip with the diaper on, wrapping all the way around baby.
To measure your baby's waist: Measure at the natural waist (where you expect the band to hit) along where the top of the diaper is hitting. If you prefer to have LO's belly button covered by your cover, then measure across there, but know that those pot-bellies will often push down the waist to the 'natural' part.