These adorable rompers are a perfect boutique style and they have easy access with a snap bottom!Cotton blend....very soft & washes well*measurements* 0-6months:21" length & 8" chest, 6-12 months:23" length & 9" chest, 12-24 months:24" length & 9.5" chestPoly Blend....very soft & washes wellPairs with big sister dress or set to match!