Here are the best twin-size mattresses, tested by CNET's sleep experts. Aly Lopez is a writer on the sleep team at CNET. She tests, researches and reviews everything sleep-related, from mattresses ...

From smallest to largest, they are: Twin size mattress Twin XL size mattress Full size mattress ... you'll have a much harder time finding sheets and bed foundations that fit.

These include small single mattresses (30 inches x 75 inches) -- notably shorter in length than twin or twin XL size ...

Learn more Casper has updated its entire mattress line ... If you sleep on your own, the Twin will probably be fine in most instances though you'll want a Twin XL if you're taller or a Full ...