I love any onesies made by Disney.  When I had my son, they were just coming out with these type with the 2 different  size snaps and the company that took our sons first pictures was giving them as a free gift with picture package purchases.  I tried that one on him when we got home from the hospital.  LOVED IT!!!!  I get tons of hand-me-down clothes from family and friends, these are the only clothes I have actually spent money on because I love them so much and they are soooooo cute as well.  I have bought 8 of them in total.  My favorite is the green Mike Wasowski onesie from Monsters Inc.  So cute!  Besides being cute the material is so soft and will definitely last a while and the fact that there are 2 different snap positions to grow with your child so they don't out grow their clothes so fast is a great idea.  My son is tiny so he'll probably get a good 6 months wear out of his (I'm hoping more) since he's 6 months right now and it's a little big on him