Sizes of Twin Beds?

[Oak Hill Cruisers]

Has anyone inquired as to if the twin beds on cruise ships are regular Twin (38" x 75") or Twin XL (38" x 80")?

 

Will probably need to take some fitted waterproof mattress liner sheets when we resume cruising and need to get as close as we can if the ships use European sizes.

 

Thanks in advance.

[Essiesmom]

Having measured them multiple times, they are about 33” wide ( I believe standard is 39x76).  I do not believe they were longer than 76.  EM