Mattress sizes & bed size chart: twin to cal king dimensions
Compare mattress dimensions from Twin to California King, understand Split King, and check the space for your frame, furniture and walking routes.
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Queen is 60 × 80 inches. King is 76 × 80.
A Full is 54 × 75 inches; a California King is 72 × 84. These are nominal mattress dimensions, not the outside dimensions of a bed frame. Check the exact model before buying a frame or bedding.
Full vs. Queen
A Queen adds 6 inches of width and 5 inches of length. Measure the larger frame as well as the mattress.
Queen vs. King
A King adds 16 inches of shared width with the same length. In the same room, that uses 8 more inches on each side when centered.
King vs. California King
California King trades 4 inches of width for 4 inches of length. It is longer, not wider; bedding and foundations must match.
Mattress dimensions in inches, feet & cm
Compare nominal US mattress widths × lengths in inches, feet and rounded centimeters. Room examples are starting layouts, not minimum requirements. On a small screen, scroll the table sideways to see every column.
| Size | Inches (W × L) | Feet (W × L) | Centimeters | Best for | Room example |
|---|---|---|---|---|---|
| Twin | 38" × 75" | 3 ft 2 in × 6 ft 3 in | 96.5 × 190.5 cm | Kids, single adults, guest rooms | 7 × 10 ft |
| Twin XL | 38" × 80" | 3 ft 2 in × 6 ft 8 in | 96.5 × 203 cm | Tall single sleepers, college dorms | 7 × 10 ft |
| Full | 54" × 75" | 4 ft 6 in × 6 ft 3 in | 137 × 190.5 cm | Solo sleepers who want space, smaller couples | 9 × 10 ft |
| Queen | 60" × 80" | 5 ft × 6 ft 8 in | 152 × 203 cm | Most couples, single sleepers who like room | 10 × 10 ft |
| King | 76" × 80" | 6 ft 4 in × 6 ft 8 in | 193 × 203 cm | Couples who want shoulder-room, kids/pets in bed | 12 × 12 ft |
| CA King | 72" × 84" | 6 ft × 7 ft | 183 × 213 cm | Taller sleepers (over 6 ft), long-narrow bedrooms | 12 × 14 ft |
| Split King | Two 38" × 80" | Two 3 ft 2 in × 6 ft 8 in | Two 96.5 × 203 cm | Adjustable-base couples, different firmness needs | 12 × 12 ft |
Room-fit planner
Will it fit, with room to walk?
Use the actual room and furniture measurements. We allow 24 inches beside the bed and 30 inches at the foot when a door is there.
Add custom furniture
Frame allowance is an estimate; measure your actual frame, drawers and headboard. Door reserves are illustrative and do not model a full swing arc.
Arrow keys move 1 inch; Shift + arrow moves 6 inches. Precise fields apply when you press Enter or leave the field.
Room to walk in this plan.
Head of bed faces the top wall. Side access target: 24″. Foot target: 24″. A connected 24-inch route was found on the planning grid.
Planning guidance only. Verify exact dimensions and access in the room, including delivery paths.
Mattress sizes at a glance
All seven standard sizes drawn to the same scale, narrowest to widest, so you can see exactly how much bed each one gives you, and whether it sleeps one or two.
Compare every size
Compare dimensions, who each size suits and example room layouts. Tap a size to browse current mattresses.
Twin
38" × 75"- Best for
- Kids, single adults, guest rooms
- Sleeps
- One
- Room example
- 7 × 10 ft
Twin XL
38" × 80"- Best for
- Tall single sleepers, college dorms
- Sleeps
- One
- Room example
- 7 × 10 ft
Full
54" × 75"- Best for
- Solo sleepers who want space, smaller couples
- Sleeps
- One
- Room example
- 9 × 10 ft
Queen
60" × 80"- Best for
- Most couples, single sleepers who like room
- Sleeps
- Two
- Room example
- 10 × 10 ft
King
76" × 80"- Best for
- Couples who want shoulder-room, kids/pets in bed
- Sleeps
- Two
- Room example
- 12 × 12 ft
CA King
72" × 84"- Best for
- Taller sleepers (over 6 ft), long-narrow bedrooms
- Sleeps
- Two
- Room example
- 12 × 14 ft
Split King
Two 38" × 80"- Best for
- Adjustable-base couples, different firmness needs
- Sleeps
- Two
- Room example
- 12 × 12 ft
Find your room to relax.
See how the sizes feel side by side at an LA Mattress showroom.
Find a showroomThe right mattress size comes down to two questions: how many people are sleeping in it, and how much room is left after the bed is in the room. Use the mattress size chart below to compare the six standard mattress sizes we stock at LA Mattress, with dimensions, who each one fits, and an example room layout to check with your frame and furniture.
Mattress size chart
| Size | Dimensions (W × L) | Best for | Example room |
|---|---|---|---|
| Twin | 38” × 75” | Kids, single adults, guest rooms | 7 × 10 ft |
| Twin XL | 38” × 80” | Tall single sleepers (6’0”+), college dorms, split-king setup | 7 × 10 ft |
| Full / Double | 54” × 75” | Single sleepers who like room; tight couples | 9 × 10 ft |
| Queen | 60” × 80” | Most couples; the default if you’re unsure | 10 × 10 ft |
| King | 76” × 80” | Couples with pets, kids, or one restless sleeper | 12 × 12 ft |
| California King | 72” × 84” | Tall sleepers (6’2”+); long, narrow bedrooms | 12 × 14 ft |
Twin, 38” × 75”
The smallest standard adult size. A twin size mattress fits kids past the toddler stage, single adults who don't want to take up the whole room, and guest bedrooms. Two standard Twins together measure 76 × 75 inches: King width, but 5 inches shorter. Two Twin XL mattresses make the 76 × 80-inch footprint of a Split King. Check frame compatibility and the delivery route before ordering.
Example room: 7 × 10 ft. Check the complete layout in the planner. Shop Twin mattresses →
Twin XL, 38” × 80”
Same width as a Twin, five inches longer. The standard college-dorm size, also the right pick for taller single sleepers (over 6'0”) who don't need extra width. Two Twin XL mattresses paired on a split-king adjustable base give each partner independent recline control on a king-sized footprint.
Example room: 7 × 10 ft. Check the complete layout in the planner. Shop Twin XL mattresses →
Full / Double, 54” × 75”
The traditional “double bed”, wider than a Twin, same length. Good for single sleepers who like to spread out, or for tight couples (younger couples in smaller LA apartments often start here). It's a comfortable solo size and a tolerable two-person size for short stretches.
Example room: 9 × 10 ft. Check the complete layout in the planner. Shop Full mattresses →
Queen, 60” × 80”
The most popular size we sell, by a wide margin. Six inches wider than a Full, five inches longer. Comfortably fits two adult sleepers with room for a pet at the foot, and works in most apartment-sized master bedrooms. If you're buying for a couple and you're not sure which size to pick, start here.
Example room: 10 × 10 ft. Check the complete layout in the planner. Shop Queen mattresses →
King, 76” × 80”
The king mattress size sits between queen and California king, the king size mattress dimensions are 76 inches wide by 80 inches long. That's sixteen inches wider than a Queen, enough that two adults can sleep without crowding each other. The right king mattress size if either partner is a restless sleeper, if you co-sleep with kids or pets, or if you simply want the most room money can buy without going taller. Note: doorways and stairs in older LA homes sometimes won't fit a king, measure before you order, or pick a split king (two Twin XLs).
Example room: 12 × 12 ft. Check the complete layout in the planner. Shop King mattresses →
California King, 72” × 84”
Four inches narrower than a King but four inches longer, the right pick if either sleeper is over 6'2”, or if the bedroom is long and narrow. A Cal King fits where a regular King won't (long rectangular rooms), and gives taller sleepers room for their feet without dangling.
Example room: 12 × 14 ft. Check the complete layout in the planner. Shop California King mattresses →
How to pick the size for your room
Start by measuring the outside of the bed frame, then add the furniture and open doors. Try a 24-inch walking route as a planning example and allow more room for drawers, door swings or your access needs. A larger mattress is useful only if the complete room still works. Use the Room Fit Planner above to compare two layouts.
Finding your perfect size
Finding the perfect size comes down to your room footprint plus how many people share the bed. For most couples, a queen (60 inches wide by 80 inches long) hits the sweet spot. A king (76 inches wide by 80 inches long) or California king (72 inches wide by 84 inches long) is the right call if you want more room, just remember that king bedding and California king bedding aren't interchangeable. For solo sleepers or a guest room, a twin size or full is plenty.
Still unsure?
Stop by any of our five LA showrooms to lie down on every size side-by-side, or take our 8-question sleep quiz for a tailored recommendation. Call us at (800) 218-3578 if you want a second opinion.
Mattress size comparison: pros & cons of each size
Every size is a trade-off between sleeping space, room space, and price. Here’s the honest case for and against each one.
Twin 38" × 75"
Pros
- Lowest price of any standard size, for the mattress and the bedding
- A compact footprint to try in a smaller room layout
- Easiest size to carry up stairs and around tight corners
Cons
- At 75" long, too short for sleepers approaching 6 ft
- Too narrow for adults who change position at night
Twin XL 38" × 80"
Pros
- Five extra inches of legroom on the same small footprint as a Twin
- The college-dorm standard, so it moves with the sleeper
- Two Twin XLs pair into a Split King on an adjustable base later
Cons
- Twin sheets don't fit, the 80" length needs Twin XL bedding
- Still single-sleeper width
Full 54" × 75"
Pros
- 16" wider than a Twin, real spread-out room for one sleeper
- Six inches narrower and five inches shorter than a Queen
- Costs meaningfully less than a Queen in most models
Cons
- For a couple it's only 27" per person, less than a Twin each
- Same 75" length as a Twin, short for tall sleepers
Queen 60" × 80"
Pros
- The most popular US size, widest choice of models and bedding
- Fits two adults in most apartment-sized master bedrooms
- Best price-to-space value for couples
Cons
- 30" per sleeper is cozy if either partner is restless
- Check the frame, furniture and walking routes in a smaller room
King 76" × 80"
Pros
- Widest standard size, each sleeper gets Twin XL-level personal space
- Best pick for co-sleeping with kids or pets
- Same 80" length as a Queen, so most sleepers fit
Cons
- Needs more floor width and a carefully measured delivery path
- Bedding, frames, and the mattress itself cost the most
CA King 72" × 84"
Pros
- Longest standard size at 84", feet stay on the mattress past 6'2"
- The right proportions for long, narrow bedrooms
Cons
- 4" narrower than a King, slightly less shoulder room per sleeper
- Cal King bedding is harder to find than King or Queen
Split King Two 38" × 80"
Pros
- Each side gets its own firmness and its own adjustable-base position
- Moves like two Twin XLs, fits stairs and doors a one-piece King can't
Cons
- A seam runs down the middle of the bed
- Needs two Twin XL fitted sheets plus a King flat sheet
Specialty, RV & camper sizes
RVs, campers, antique frames, and odd rooms use non-standard dimensions. RV specs vary by manufacturer, measure your RV’s platform (width, length, and corner cuts) before buying, and ask any showroom about custom size options.
| Size | Inches (W × L) | Typically used in |
|---|---|---|
| Short Queen (RV Queen) | 60" × 74–75" | RVs, campers, and fifth wheels, queen width, 5–6 inches shorter, Short queen RV guide |
| RV King | 72" × 75–80" | Larger RVs and fifth wheels, between a queen and a residential king |
| RV Bunk | 28–35" × 75–80" | RV bunk areas, widths vary by floor plan, so measure before buying |
| Full XL | 54" × 80" | Taller solo sleepers who want full width with king-length legroom |
| Three Quarter | 48" × 75" | Antique bed frames and small guest rooms, between a twin and a full |
| Olympic Queen | 66" × 80" | Couples who want 6 extra inches of width without king bedding |
How to choose the best king size mattress
King is the size shoppers research hardest, it’s the biggest spend and the hardest one to move. Six things to check before you buy, then our current best-selling kings.
Confirm the king size measurement first
A standard King mattress measures 76" wide × 80" long (6 ft 4 in × 6 ft 8 in). California King trades 4 inches of width for 4 inches of length at 72" × 84". King bedding and Cal King bedding are not interchangeable, so lock the size before comparing models.
Motion isolation
Not feeling a partner move is the main reason couples upgrade to a King. Memory foam and pocketed-coil hybrids absorb motion best; traditional connected-coil innersprings transfer the most.
Edge support
A King is only as big as its usable surface. Reinforced edges let you sleep to the rail instead of drifting toward the middle, effectively buying back a few inches of the width you paid for.
Cooling, more so than smaller sizes
Two adults (plus kids or pets) put more heat into one bed. If either sleeper runs warm, look for breathable coil layers, gel or ventilated foams, or a latex comfort layer.
Split King option for adjustable bases
If you want independent head/foot positioning or different firmness per side, buy two Twin XLs as a Split King instead of a one-piece King, the footprint is identical.
Room and delivery path
Try a 12 × 12 ft room as one starting layout, then add the actual frame, furniture and doors. Measure stairways and turns, and confirm delivery access before choosing a one-piece or split design.
Our best-selling king mattresses
Diamond Dreamstage Value Collection Topaz Firm Tight Top 7" Mattress
Eastman House Spruce Firm 9" Mattress
Eastman House Spruce Medium Pillow Top 11" Mattress
Mattress size FAQs
The 14 questions shoppers ask us most often about bed sizes, answered.
What size is a 60×80 bed?
A 60" × 80" mattress is a Queen, the most popular size in the US. In feet that's 5 ft × 6 ft 8 in, or 152 × 203 cm. It fits most couples and works in a bedroom as small as 10 × 10 ft. Shop Queen mattresses.
What are king mattress dimensions in feet?
A standard King mattress measures 6 ft 4 in × 6 ft 8 in (76" × 80" / approximately 193 × 203 cm). California King is narrower but longer: 6 ft × 7 ft (72" × 84"). Room fit depends on the outside of your frame, furniture and the walking routes you need, rather than one minimum room size. Shop King mattresses.
King vs California King, what's the difference?
King is wider (76") but shorter (80"). California King is narrower (72") but longer (84"). Pick King if you want shoulder-room for two sleepers; pick Cal King if either sleeper is over 6 ft tall or your bedroom is long-and-narrow. Read the full King vs Cal King guide.
What size is a twin bed?
A standard Twin mattress is 38" × 75", about 3 ft 2 in × 6 ft 3 in (96.5 × 190.5 cm). It's the smallest standard mattress size and the right choice for kids, single adults in studio apartments, and guest rooms. Shop Twin mattresses.
Twin vs Twin XL, what's the difference?
Twin XL is the same width as Twin (38") but 5" longer, 38" × 80" instead of 38" × 75". Pick Twin XL if the sleeper is over 5'6" or if you're furnishing a college dorm (most dorms spec Twin XL frames). Shop Twin XL mattresses.
What are full size mattress dimensions?
A Full (also called Double) mattress is 54" × 75", 4 ft 6 in × 6 ft 3 in (137 × 190.5 cm). It's 16" wider than a Twin but the same length, so it gives solo sleepers more elbow room without needing a much bigger bedroom. Shop Full mattresses.
Is there a mattress size chart in feet?
Yes, the reference table above lists every standard mattress size in inches, feet, and centimeters. Twin is 3 ft 2 in × 6 ft 3 in; Queen is 5 ft × 6 ft 8 in; King is 6 ft 4 in × 6 ft 8 in; California King is 6 ft × 7 ft.
How big is a Queen size bed in feet?
A Queen is 5 ft × 6 ft 8 in (60" × 80" or 152 × 203 cm). It's 6" wider than a Full and 5" longer, which is why it's the most-bought US mattress, enough room for two without dominating the bedroom.
What size mattress is best for couples?
Queen (60" × 80") is the most-popular couples size, fits most US bedrooms and most bedding budgets. Upgrade to King (76" × 80") if either sleeper tosses, you co-sleep with kids/pets, or your room is at least 12 × 12 ft.
What's the smallest bedroom that fits a Queen?
There is no single minimum for every layout. In a 10 × 10 ft room, a Queen with a frame adding 2 inches on each edge has a 64 × 84-inch footprint. Center it across the room with the head against the wall and there are 28 inches on each side and 36 inches at the foot, before furniture. Check door swings, drawers and your access needs in the planner. Check your complete room layout.
What is a Split King and who needs one?
A Split King is two Twin XL mattresses (38" × 80" each) side-by-side, totaling the same footprint as a regular King (76" × 80"). Each half can be raised or reclined independently on an adjustable base, so couples with different sleep positions or firmness preferences each get their own profile. Shop Split King mattresses.
Do you deliver every size, or do I move it myself?
Next-day white-glove delivery is free across Los Angeles County on orders over $499, in every size we stock. Need it sooner? Same-day is a flat $100 when you order by 4 PM. We bring the bed in, set it on your frame, and haul the old one away. No tying it to your roof. Find your nearest LA showroom.
I'm not sure which size fits my room, what should I do?
Measure the room and the outside of your bed frame. Add doors and furniture to the Room Fit Planner, then compare the walking space with two mattress sizes. Confirm the exact frame dimensions and delivery route before ordering. Our showroom team can help compare the sleeping space in person. Try the Room Fit Planner.
What's the largest standard mattress size?
For mainstream bedding-compatible sizes, California King is the longest (84") and King is the widest (76"). Beyond standard, you can custom-order a Wyoming King (84" × 84") or Alaskan King (108" × 108"), call us if you need either; they aren't stocked on the floor.
Related size guides
Deeper dives on every standard mattress size, head-to-head comparison, and room-layout question.
By size
Size comparisons
Not sure which size fits your room?