How thick is the Endy Mattress? Administrator 12 July 2018 15:36 Updated Every size of our mattress is 10 inches in height. Related articles Will I feel any motion transfer on the Endy? How much does the Endy weigh? Can you tell me more about the foam in the Endy Mattress? What makes the Endy Mattress unique? Do you carry a Single or Double size Mattress?