TAMU Keathley Hall

I am staying in Keathley hall and the website says that the mattress size is bigger than a standard twin and smaller than a twin XL. I have searched everywhere trying to find 36 X 77 in sheets and am having no luck. Does anyone know where I can find that size or if the twin XL sheets (38 X 80 in) will work on the bed?

All the twin beds at A&M are that size. We just got extra long sheets. By the time you put a foam topper on the bed it is actually nice that the sheets are a little big to fit over all of it without too much trouble.