Image from onestepahead.com
These little pieces of fabric are onsie extenders. They have three snaps on each end and connect to the front and back of a onsie. And they are exactly what we need.
Tye is a tall, lean shape these days. She is outgrowing things in length that she still doesn't fill out. All those footed pajamas in the 3 month size got about 1 month worth of wear before she could no longer extend her legs while wearing them, so they have been moved to the Too Small basket. A large collection of adorable onsies were about to face the same fate when I discovered these a couple weeks ago. Now, all those too-short but plenty wide onsies will have a few more weeks in the dresser (if we're lucky).