Purchased this for my sons new twin mattress but accidently ordered a full. I decided to put it on our full bed. It fits perfectly. Says it fits up to a 16" pocket depth but ours is 14" and was perfect and will stay on without having to constantly redoing corners. I did however put my old 5 sided mattress pad over it though as I didnt like the plasticy sound it makes. Over all a great product at a great price and I know it will completely protect my investment! Recommend for 12" - 14" pocket depth.