This outfit is adorable, and I'd recommend it for a special occasion because you're not going to get more than one use out of it.  I bought the 12-18 month size for my 11 month old 20 lb, 29" baby, and it was so tight out of the package that the snaps popped open each time he moved.  A few threads were dangling when it arrived, which were easy to trim.  I washed it according to the directions, and the outer fabric shrunk down to about a normal size 6-9 months while the liner didn't shrink and hung out on all sides.