Twin XL Mattresses in Los Angeles

A twin XL mattress measures 38 inches wide by 80 inches long — that is 3 feet 2 inches wide and 6 feet 8 inches long. It is the same length as a queen or king mattress, just significantly narrower. The minimum room size for a twin XL is approximately 7'×10'. A recommended room size is 8'×10', which gives you walking clearance on both sides and space for a nightstand. Twin XL is the standard size for most U.S. college dormitory beds.

Yes — twin XL is specifically designed for adjustable base use. The most common adjustable base configuration for couples is a split king: two twin XL mattresses placed side by side on a split king adjustable frame. This setup lets each person control their own head and foot position independently. Because the twin XL is exactly half the width of a king (38" + 38" = 76"), the fit is precise. Most major adjustable base brands — including Tempur-Pedic, — size their split king bases to accept two standard twin XL mattresses. If you are buying a twin XL for an adjustable base, make sure to choose a flexible foam or hybrid — not a rigid innerspring — for best compatibility.

Almost certainly yes. The twin XL is the standard dorm mattress size in the United States. Most college and university dormitory bed frames are built to hold a 38" × 80" mattress. Before ordering, confirm your dorm's bed dimensions with your housing office — a small number of older dorms still use standard twin (38" × 75") frames. For most students, a twin XL mattress is the correct purchase. We carry twin XL mattresses at every price point from $439, including options thin enough for dorm bunk frames.

Yes. Two standard twin XL mattresses placed side by side measure 76" × 80" — exactly the same dimensions as a standard king mattress. This is a popular configuration for couples who want different firmness levels, different materials, or the ability to use a split king adjustable base. Each person can choose their own mattress independently. A bed bridge or split king connector keeps the two mattresses from separating during the night, and standard king sheets (which are oversized) fit over both mattresses together. The only limitation is that a split king requires a king-size bed frame or adjustable base.

At LA Mattress Store, twin XL mattresses range from $439 for a quality foam or innerspring to $5,199 for a Tempur-Pedic LuxeAdapt or Stearns & Foster Estate tier in twin XL size. The best value range for most shoppers is $599–$1,299, where you find strong hybrid options from and Helix. For a luxury twin XL — typically used in a split king adjustable base setup — $1,500–$2,500 covers the top tier from most premium brands. All twin XL mattresses include free delivery.

Firmness depends on sleep position and body weight. Side sleepers typically need plush to medium-soft for hip and shoulder pressure relief. Back sleepers do best with medium to medium-firm for lumbar support. Stomach sleepers need firm to extra-firm to keep the hips from sinking. For college dorm use, medium is the most versatile choice — it works for most sleep positions and adjusts to a range of body types. For an adjustable base, medium to medium-firm is generally recommended as a starting point. We carry twin XL mattresses in plush, medium, firm, and extra firm.

The choice between twin XL and full comes down to width vs length. A twin XL is 38" wide and 80" long. A full is 54" wide and 75" long. Twin XL is 16 inches narrower but 5 inches longer than a full. For a tall sleeper (6' or over) who sleeps alone and does not need much width, twin XL is the better fit. For a shorter sleeper who moves around at night and wants more room to spread out, a full provides significantly more surface area. Twin XL also makes sense for dorm beds and split king setups — situations where a full is not practical.

The minimum room size for a twin XL mattress is approximately 7'×10'. At that size, you will have a few inches of clearance at the foot of the bed and on each side. The recommended room size is 8'×10' — that gives you roughly 24" of walking clearance on one side (the other can be against a wall), space for a nightstand, and a dresser opposite. The twin XL's narrow 38" width makes it one of the easiest mattress sizes to fit in tight spaces, including dorm rooms, small bedrooms, and guest rooms.

Yes. We carry 128 twin XL mattresses across 9+ brands and have a strong selection available to try in person at our Los Angeles showrooms. This matters especially for adjustable base shoppers — we recommend testing your twin XL mattress on an adjustable base before buying to confirm the flex and feel you want. All 5 of our LA showrooms carry twin XL options from Tempur-Pedic, Stearns & Foster, Helix, and more. Mon–Sat 10am–8pm, Sat-Sun 10am-8pm. No appointment needed.

Yes. All twin XL mattresses come with free delivery. We also offer White Glove delivery on select orders — our team delivers, unpacks, sets up the mattress on your frame or adjustable base, and removes your old mattress at no charge. Every twin XL mattress is backed by our 120-night sleep trial and 0% APR financing. Call us at (800) 218-3578 or visit any of our 5 LA showrooms.