If you are pressed for space like we are in out 936 sq ft home and having a surprise 4th child a mini crib is a must. This mattress is the size of a standard pack n play if you are needing a comparision. It is firm on one side for a small baby and softer for a toddler. I will post picturea once our crib and bedding comes in closer to the due date. It is also the perfect size for our bedroom.