So, I guess they aren't going to stay babies forever.
They fit 6-9 months still and I actually have a few 6 month onesies. It's the length part. Footed jammies need to be 9 months because it's pulling on them, unless I cut out the feet. But it's going to be summer anyway.
Pretty soon it's going to be 12 months and then...their 1st birthday.