Fulfilled by our friends at Newton Baby This mattress fits the full crib and toddler bed forms of each of our cribs and is a standard size.   Every inch of the Newton Crib Mattress was designed with your baby’s health, safety, and comfort in mind. The innovative design features Newton's patented Wovenaire® core which is zipped into a breathe-thru cover, allowing air to flow freely for optimal breathability and temperature regulation. The 2-stage Newton Crib Mattress' design gives it a unique longevity through the toddler years.