Full XL Mattress Toppers

A full XL mattress topper measures 54 by 80 inches, matching the mattress exactly. A standard full topper will not work, because a full is 54 by 75 inches and falls five inches short at the foot. The width is identical on both, so length is the only thing separating them.

Measure the bare mattress from the head seam to the foot seam. A full XL is 80 inches long and a standard full is 75, while both are 54 inches wide, so length is the only difference and the two look identical once the bed is made. Full XL turns up most often on adjustable bases and in some college dorms, so check rather than assume if you inherited the frame.

Yes. Full XL, double XL and extra long full are three names for the same 54 by 80 inch mattress. A topper sold under any of them fits the same bed.

No. A queen is 60 by 80 inches, so a queen topper is six inches too wide even though the length matches exactly at 80 inches. The extra foam folds down the sides instead of lying flat, and it will not settle no matter how you position it.

No. A twin XL is 38 by 80 inches, so it shares the 80 inch length but leaves 16 inches of the bed uncovered. Two twin XL toppers side by side do not work either, since together they measure 76 inches against a 54 inch bed.

Not neatly. A full XL topper is five inches longer than a standard full at 54 by 75 inches, so the excess gathers at the head or the foot. The width matches, which is why people try it, but the length does not.

Choose a full XL when you need the length but not the width. Both beds are 80 inches long, so a tall sleeper gets the same legroom either way, while a queen is six inches wider at 60 inches. If the room cannot take a queen frame, a full XL keeps the length in a narrower footprint.

Only in length. A full XL is 54 by 80 and a full is 54 by 75, so the five inches all go to the foot of the bed and nothing is added across it. Two people still get 27 inches each on either size, which is less width per person than one sleeper has on a twin.

Often not, and this size makes it harder than most. A 3 or 4 inch topper raises the surface enough that standard fitted sheets stop reaching the corners, and full XL sheets are difficult to find in the first place. Work out the total depth before you order and buy the sheets at the same time, and remember a mattress protector adds around another half inch.