The sheet holder straps are roughly 12” across and need to be centered under the mattress. I have no clue how someone with a bigger bed could attach them without having help.

I would reckons these to anyone who has problems with sheets falling off their bed. I have a very thick mattress with a pillow top and 2” memory foam topper and it keeps my sheets on no problem.

Adjustable sheet straps are well worth the money and have finally solved our baggy puckering fitted sheet dilemma. I just use one strap across the width of my bed and it keeps my sheets nice and crisp.

The tension just slips looser and looser. Doesn't hold bedsheets very good.