Adorable panties. Leg holes were too tiny for even our skinny mini to fit though. The 18 month ones were the same size as a pair of newborn bloomers we had to give you an idea on sizing, but the leg hole didn't stretch as much as the bloomers. We ended up giving ours to a new momma to use as bloomers. Would recommend sizing up, but if you are getting these for a baby with a flat bottom (as was our case), the leg hole renders them a no go. Sizing up would just mean they would be super baggy in the bottom like any other brand of small panties. The search for smaller underoos for kids with a flat bum continues!