Does this include the bed frame or mattress?

No. It is a headboard only, so you need a king bed frame and mattress separately. Check that your frame's mounting points line up before buying.

Will it fit a standard king bed?

It is 78 inches wide, which covers a standard king mattress width. Measure your frame's width and your wall space, since the headboard is wider than the mattress itself.

How tall is it compared with other headboards?

At 51 inches it is taller than most standard headboards, which typically run 40 to 50 inches. That gives more of a backdrop but may cover wall outlets or trim.

Is it real wood or engineered wood?

It is listed as solid wood, which sets it apart from the particleboard and MDF headboards common at this level. Solid wood is heavier and holds up better to knocks.

How do I mount it to my bed frame?

Most wood headboards like this attach to the frame's legs or a wall bracket. Confirm the included hardware and your frame type match, since mounting methods vary between frames.

Is the gray finish painted or stained?

It is a gray painted finish, so expect a solid color rather than visible grain. Wipe it with a damp cloth and touch up edge chips to keep it looking even.