What drop length should I get for my bed skirt?

Measure from the top of your box spring or platform to the floor. A 14- to 16-inch drop is standard for most modern beds and box springs; 18-inch drops are common for taller mattresses or pillow-tops; 22- to 24-inch drops are for high-profile frames or beds you want to use for under-bed storage. Verified-purchase reviewers across retailers repeatedly flag buying a drop that's too short as the #1 regret, so if you're between sizes, size up an inch or two.