How thick is the Endy Mattress? Melissa July 12, 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? Do you carry a Single or Double size Mattress? Can you tell me more about Endy's foam? What makes the Endy Mattress unique?