Haddad Brothers Baby-Boys Newborn Christening Baptism Satin Long Pants with Vest 100% Polyester Made in US Dry Clean Only The baseball cap has an elastic back for best fit Button back closure 0-3 months fits birth to 12 pounds, 6-9 months fits 12 1/2 to 16 pounds, 9-12 months fits 16 to 20 pounds