standard twin mattress

Twin: 39 in. wide x 75 in. long. Twin XL: 39 in. wide x 80 in. long.

Thicknesses shown range from about 10 in. to 18 in., with common profiles at 10, 12, and 14 inches. An 18-inch option appears for elevated air models.

Most boxed memory-foam mattresses need about 24–72 hours to regain full shape. At least one listing specifically advises allowing up to 72 hours for full expansion.

Capacity varies by model: several air mattresses are rated around 300 lb, while at least one elevated air option lists a maximum capacity of 600 lb.

Warranty and trial lengths vary. Some listings show short limited/trial periods (30-, 90-, or 180-day limited coverage), while several foam or hybrid mattresses list 10-year limited warranties.