I ordered a pack of these in the 12 month size for my baby girl.  They arrived factory-sealed and when I opened them I laughed out loud; the package contained 1 sleeper sized 6 month and the second sleeper was sized 18 month!  True, if you average the two sizes, it does equal 12 month, but since that doesn't work so well off paper I called Gerber.  They were gracious and apologetic and sent a return label so they can see were the packing breakdown happened.  The little sleepers are cute and very snuggly, just be aware that you may have some hoop jumping if they have a whole batch incorrectly packaged.  I look forward to getting the replacement, if they have them.