SIZE SMALL/MEDIUM: The SwaddleMe® Original Swaddle in Small/Medium fits babies 0-3 months, 7-14 pounds, up to 26 inches long.EASY TO USE: The wings of this adjustable swaddle blanket wrap around baby for the perfect fit every time.SECURE WRAP: Hook-and-loop closures keep the swaddle from coming loose. Slits on the back allow for use in swings and bouncers. (Do not use in infant car seats.)COZY FIT: This baby swaddle wrap creates create a cozy feeling, preventing the startle reflex.SOFT MATERIAL: This newborn swaddle is made out of durable natural fiber (100% cotton).EASY CARE: The SwaddleMe Original Swaddle is machine washable.STAGE 1: The SwaddleMe Original Swaddle is part of Stage 1 in the SwaddleMe Stages of Sleep, perfect for your newborn who is not yet rolling over and likes to be swaddled with their arms in.WHEN TO TRANSITION: When baby starts showing signs of rolling, transition to Stage 2 in the Stages of Sleep.