I believe there are ones available that will fit. Same general size, Full, Queen, King, just taller. A little more expensive of course, but they should be available.
It really depends on the mattress and the sheets, but my guess would be no.
Sheet straps.
A mattress typically refers to the main part of the bed that you sleep on, while a mattress set usually includes the mattress along with a box spring or foundation. So, a mattress set consists of both the mattress and its accompanying base for support.
Quality dorm bedding are most comfortable for sleeping. Dorm bedding includes sets of sheets, soft mattress, blankets, comforters, pillows and pillow cases.
Linens and things, HomeGoods, Bed Bath and Beyond all have awesome bedding sets
No, but you can sell the sheets or whatever and toss a mattress in for free...
Reg size sheets
Yes, but these days most "standard" sheets are labeled "deep pocket." If you have a thick mattress topper, you'll need "extra deep pocket" sheets. It's best to measure your mattress with the topper in place, then look for sheets with the mattress depth on the package. If all else fails, just buy flat sheets and make your bed Hotel style, tucking the corners.
No
A regular twin bed is only 74 inches long. An XL twin is 80 inches long. So the answer is NO.
twin
Sheet sizes vary depending on the manufacturer. Most standard twin flat sheets measure 70 x 96 inches. The fitted sheet will be about 39 x 76 inches. When shopping for sheets, you may also want to measure the depth - or thickness - of your mattress before buying. Mattress depth can vary greatly depending on the manufacturer and can influence the way the sheets fit. Most regular mattresses are between 9 and 12 inches deep. Pillow-top mattresses can add several extra inches to the depth of the mattress and may require an extra-deep fitted sheet. An extra deep fitted sheet will be labeled with the depth size of the largest mattress it will fit. An xtra-long twin fitted sheet measures 39 x 80 inches.