Determine on each and every your t-shirt and bodysuit measurement. Approximate sizing for the bodysuits: Newborn (Up to seven pounds) six Months (seven-seventeen pounds), 12 Months (seventeen-20 five pounds), 18 Months (20 five-thirty pounds). T-shirts are regular adult unisex sizing. This is a two-piece established. one particular hundred% cotton on each and every the t-shirt and the bodysuit This will make the cutest fb/instagram/pinterest pictures! Outstanding substantial quality, cozy and fun.