First, for a just over two-year-old (by the summer):
The first is size 2T according to the pattern, the second, a slightly smaller size 2T, and the bottom one is size 3T, made as separates.
This is a very well designed pattern and tutorial, and I have used it with only minor modifications. Anyone who reads my blog will know that I almost always fiddle to make things work for me. Either the size isn't right, or I want to use the armhole of one with the bottom of another. So most of the time in making something for my grand-daughters is the initial planning of how to do it, and then making my own pattern. Sometimes the original is unrecognisable. However, this was not the case here, it is a great pattern, and I think the small modifications I did make could be helpful to anyone making the younger sizes. Mainly, I wanted them to work for toddlers not yet able to undress themselves quickly to use the bathroom.
So go ahead and use Corinne's lovely pattern, and follow her instructions: but if you are making for a very young child, you might want to read my blog as well! Below, I show how to make the modifications so a young child can have a nappy changed, or can easily use the potty without getting completely undressed!