Does it include a mattress?

No. It is a bed frame only, so you need a standard twin mattress. A box spring is not required because the frame has a slatted base.

What mattress size fits?

A standard twin mattress. Check the frame's inner dimensions before buying a thick pillow-top, since deep mattresses can sit high above the side rails.

Can two people sit on it as a sofa?

Yes, the back and arms make it usable as seating, but it is a twin-size bench, so it seats two adults snugly. It works best as a single lounging spot or for kids.

How hard is assembly?

It is flat-pack and comes in several pieces with hardware. Expect an hour or more with two people; a screwdriver and a clear floor area help.

Does it have storage or a trundle?

No. This model has no drawers or pull-out trundle. If you need extra sleeping space, look for a daybed with a trundle option.

Is the finish real wood?

The frame combines solid wood with MDF panels, and the white and beige surfaces are painted. Wipe spills promptly and use coasters to protect the finish.