It would never fit smoothly, it would come untucked and get all wrinkly and fold-y under your toes.

Could you take it to a seamstress and have it modified?

I have a full sized bed and I have tried doing this with queen sheets. Don't. It never works well and is a big old hassle every time you make the bed, besides.

I hate when I fall in love with a sheet set design/color only to discover it's sold out in the size I need. ugh. Just offering my sympathies.

Did you try other sources online?

I am in agreement with the sloppy always pulling out look but just wanted to see if it was just me. Darn. The sheets are Eileen Fisher linen/cotton on sale at Garnet Hill and the price is reasonable. My husband did not want to use the top sheet as a botyom sheet but looks like that is what will happen.

I much prefer using a flat sheet on the bottom. As I have gotten older, I find they are easier to get on, I can pull them tight with no problem, and they stay tucked in. Just make sure you buy the larger size to be sure you have ample material to tuck under the mattress. Maybe your DH will become a convert, too!

Actually, we have two sets of king size sheets for our king size bed - the fitted sheet on one of the sets is much larger than the other, and I much prefer tucking in the larger one than fighting with the smaller one.

I do it all the time because it's so much easier for me to get a king-sized fitted sheet onto my thick queen-sized mattress and I prefer king-sized pillowcases. The length is the same; it's just the width that is larger. I put one side on so it fits perfectly, then tuck the other side way under the mattress. Because it goes so far under the mattress, your body weight keeps it in place while you sleep.

Fun2BHere is right -- the length would be the same (unlike a full to queen comparison) and if you pull the sheet all to one side, it would give more to tuck under so that the weight of the mattress will hold it in place better -- like using a flat sheet. The flat sheets stay tucked in better than I thought they would, but you need enough to get truly tucked under so the weight of the mattress does hold it in place. I'd never had a flat bottom sheet before buying the linen. The only issue we have is our new bed frame that makes it harder to tuck with the low profile box. If your sides are exposed, you shouldn't have a problem tucking.

That would drive me crazy. I like a taught sheet to sleep on.