The softest old pink-flowered sheet (and a plain cream coloured sheet for inner). I absolutely love LOVE that this is a 1-piece pattern. My kind of sewing project. (http://mellysews.com/2012/05/criss-cross-dress-tutorial-aka-easiest.html)
Q&A with Julie Buchner
Looks cute, what size is it?
Julie Buchner answered:
It's 3-6mos. I did find a bigger sized pattern online, too, but I haven't tested it out yet :)