Matt, my BIL , sent us this costume from our nephew Logan. It's a 6-9 month costume :) Hopefully it wont be unseasonably warm this year. Oh, and in case you were wondering, Jacob (whom I often refer to as Biggie,Biggie Smalls, Big Poppa) is 3 months old now, is 14 lbs 2 ozs and is 24 1/2 inches long.