Medium, fits like a looser size small fit. Gently worn in. Very warm and comfy for winter! These Plushy Pajama Pants are a warm & cozy fleece-textured piece tailored to be one half of the coziest new PJ set in your wardrobe! • Elastic waistband and ankle cuffs. Rear pocket. • Warm faux fleece to keep you cozy in bed & around your home. • Size M is 38.9" in length. Pair with the matching top for a loose-fitting cozy set you won't want to change out of!