This gown is size Newborn and fits best on brand new babes up to 3m size (up to 12lbs). The fabric we used is super stretchy, made from bamboo viscose, wait until you feel how soft it is! Coordinating Gigi and Max buttons and the slits at the shoulder make taking on and off baby from the top down very easy! Knot on the gown can be tied and untied as needed for quick diaper changes! Mitten cuff on arm keeps baby from scratching.