Need help filling in the space between the mattress and foot,headboard

You can purchase a piece of dense foam to fit in the space. I rolled a comforter and placed it at the foot, but no one ever sees it.

Hello Tanya. They actually sell fillers for that gap between the mattress and the headboard or footboard. They are sold under different names — some of them are Mattress Wedge, Gap Guard Shield, Mattress Extension and Mattress Crack Filler. They are easily found online. Another solution is to buy a couple of those long body pillows and place them in the crack and add a couple of regular pillows on top of then. Good luck!

It seems like you have a Full mattress and box spring on a Queen size bed frame. Or, a Queen size Set of box spring and mattress on a King size bed.

i would do body pillows or build a box the size of the opening with wood and it can become a great storage place.

Perhaps wood bedboard -on the bottom and body pillow on top?

Maybe make a box to fit in there for storage and then put a body pillow on the top or cover the lid with foam and fabric

Some frames have an adjustment in the area where the metal L bar joins. Did you happen to notice if yours is adjustable?

I would move the mattress down to the bottom and get some dense foam for the top. Cover it with fabric or an old quilt or sheet. Put the pillows on that area which now makes the bed longer.

Or get a board and put it at the bottom to stop the mattress from moving. Then use the area for under bed storage boxes and cover with a board and put a handle on it. To make a cover for storage

Foam board