SHOP LESS, SPEND LESS - Get more growing time from each size. Size 0-6 fits 0 - 3 months AND 3 - 6 months; 6-12 fits 6 months, 9 months AND 12 months; 12-18 fits 12 months AND 18 months, 18-24 fits 18 months AND 24 months. STRETCHES TO FIT AS BABY GROWS - Lightweight, breathable 4-way stretch fabric encourages free-flowing movement and comfort as baby grows. EASY ON AND OFF - Expandable neckline makes it easy to pull these cute baby clothes over your little one’s head. MORE QUANTITY, MORE QUALITY - Available in a convenient 4-pack of assorted colors and adorable prints. COLD WATER WASH - Hanes recommends washing this product in cold water to help reduce energy usage. HANES FLEXY - Total comfort from head to sweet little toes as your baby stretches and twiddles and fidgets and grows.