Originally Posted by Elemenopy
Bumping for you, because I have a new generic frame/mattress but no headboard yet, so need the answer also.
If I may add a corollary remark, I have seen some headboards advertised as working for both queen/king frames. Does anyone know if this is reliable? I have a king frame and want to just order a headboard online. Tired of my pillows falling down and smothering the dustbunnies at 2 AM.
I have a headboard that supports a full or queen frame. The headboard is queen width, so it's wider than my full mattress. The hardware on the headboard has really long horizontal slots into which you can put bolts from the queen/full frame. Put the bolts in the innermost edges of the hardware slots and the frame is full-sized. Put the bolts for the frame on the outermost edges of the hardware slots and the frame is queen-sized.
I'm sure it works the same for queen & king. But there's only a 6-inch difference between full and queen, so the headboard is 3" wider than my mattress on each side. It's 16" for queen and king, but you have a king so you wouldn't have a headboard wider than the mattress.