Six standard mattress sizes are available. Twin and twin XL are the smallest standard sizes. They both measure about 38 inches wide, making them best suited to single sleepers. Full size dimensions are a bit wider, but may still be too narrow for two people. Queen size dimensions measure roughly 60 inches wide and 80 inches long, making this a suitable size for anyone who shares their bed with a partner. King and California king are the largest standard sizes and should provide ample space for two people, especially if small children or pets also share the bed. Even larger sizes such as the Alaska king are available, but not widely — and usually require a custom order. If you and your partner use an adjustable bed, you may want to consider a split queen, split king, or split California king mattress. These models are divided lengthwise down the middle, allowing each of you to adjust the bed to your preferred angle without affecting the other person.