SleepytimePjs Infant Christmas Pajamas Cotton Blend Make your baby's First Christmas one to remember. Perfect for Christmas Morning Pictures! Matching Pajamas available for the whole family (and prime eligible) - Search 'SleepytimePjs Family Matching' for all Family Matching Pajamas Sizes run as follows: 6 Month, 12 Month, and 18 Month. Please Note: For childs safety, childrens sleepwear should be snug-fitting or flame resistant.This garment is snug-fitting.