DD1 is super skinny, and went straight from 18 months into 2T because she needed the length, not the width. Since she potty trained around 2.5, her 18 month skirts/shorts STILL fit this summer without the diaper bulk - she's been in them forever!

I'm not sure what DD2 will do...but I'm buying a few things ahead for her in the last of the summer sales, and am debating whether or not I need to fill in the gaps in the hand me downs from big sister's wardrobe, since everything is either 18m or 2T.

I'm curious how common it is to totally skip the 24 month size - maybe DD2 won't need anything, either. What did your LO do?