Want to get a new mattress for your next baby? Or are you needing to replace the one you got with your mini crib? This is the "Original Mini crib mattress" from Nestig. This comes with the Wave crib. "our mini is a non standard size, mattress dimensions: 27.5" x 22.5" x 2") - as our original mini mattress is not waterproof we strongly recommend using with a waterproof cover"