We recommend measuring your bedroom to understand what sizes will fit comfortably, then choosing a large enough mattress size that you can move freely during the night.
If you don’t sleep with a partner and want to keep your mattress size smaller, you may choose any size smaller than the Full mattress (or a 4’6” mattress). If you sleep with a partner, the smallest comfortable size will be the Full mattress, but we recommend a Queen or King to have complete freedom of movement.
Lastly, don’t overlook you or your partner’s height! If one of you is taller, you may consider the ‘long’ version of any mattress size.