If queen-, king-, or California king-sized mattresses are too big for your liking, the more modest full-size mattress might be the right choice for you. This space-saver can easily fit into tight quarters without monopolizing space, making it perfect for a child’s bedroom, narrow dorm room, or a dual-purpose guest room in your home. Costco offers a diverse selection of superior-quality mattresses at very affordable prices. From pressure-relieving memory foam to luxuriously soft pillow tops, we have a mattress to satisfy everyone’s needs.