Infant Size Fits from newborn up to 2 years; 8-35 lbs, and starting at 22" tall. Has an adjustable base to cinch the panel of the carrier, allowing young babies to be legs out with proper positioning and without an insert. The infant size carrier panel measures 15″ high (add 2" for headrest) x 9-15″ adjustable width. Strap Size Plus Size: Size 18 and up (24″ straps+ 13″ of webbing; waistband fits 26″-60″) - great for large busted women, and tall men.