We use cloth diapers but I want to buy disposables for LO's emergency bag for my MIL.

I think we have been using size 3 diapers since last summer. She currently weighs 22 lbs.

When did your LO start wearing size 4? I think the range for size 4 Pampers starts at 22lbs and the range for size 3 goes up to 27lbs?