A common setup uses the tatami or platform as the base layer, optionally a moisture pad beneath the futon, and sheets, a fitted cover, or a protector on top as with any mattress. After sleeping, lift or stand it so moisture escapes from the base. For a tatami room, 100 cm suits one person or a guest spare, 120 cm gives more room, and the 140 cm Extra-Wide Single is spacious for one and can suit two smaller sleepers.
For buyers researching shikibuton, shikifuton or a Japanese floor mattress, the key point is how this bedding is used: on a firm, ventilated surface, folded away when needed, and cared for as part of everyday Japanese living.