Dorm Room Essentials

Almost every college dorm bed is a Twin XL, measuring 38 to 39 inches wide by 80inches long. That is the same width as a standard twin but 5 inches longer. Always confirm with your school's housing page before you buy, since a small number of dorms use standard twin or full beds.

Yes, and it is the first thing to put on. Dorm mattresses are reused semester after semester by different students, so a protector puts a clean, washable barrier between you and everything that came before. Look for one that is breathable rather than plastic-backed, so it does not trap heat while you sleep.

The short list is a mattress protector, a mattress topper, one or two sets of Twin XL sheets, a pillow, a pillow protector, and a comforter. A second sheet set matters more than people expect, since dorm laundry is shared and rarely convenient. A throw blanket and a sleep mask round it out for rooms with a roommate on a different schedule.

Not well. A standard twin fitted sheet is 5 inches too short for a Twin X L mattress, so the corners pull loose and pop off overnight. Buy Twin XL sheets, sometimes labeled extra long twin, and you will get a fitted sheet that stays put.