Hi, I just recently bought a fitted sheet and flat sheet that advertise they fit both twin and twin XL sheets. Right now, I’m a little paranoid on if they will actually fit a twin XL, especially since I plan on using a 1 and a half inch or 2 inch mattress topper. In anyone’s personal experience with this sort of thing, did it work out alright? The sheets say the depths of the mattresses they fit range from 9 inches to 18 inches, if that helps. Thanks!
Last year for my son’s dorm bed I got twin XL sheets and a thick mattress topper. It worked fine.
Dorm mattresses are generally thin. You will be fine. (This worked for my son’s bed at a different school.)
You could call around to see if a local mattress store has a twin XL mattress that you could try the fitted sheet on.