The 1-4 size fits babies from about 1-4months and up to 26" long. The actual size of the kindersack sleepy sack is 27" long when lying flat. All natural cotton Pink & Blue Gingham Kindersacks Holiday Kindersack Quilted Blue Toile Kindersack Pink Toile Sleepy sacks Down-filled Infant Sleeping Sack 0-12mo (c) Passport Baby, LLC 2001-2007 All designs protected.