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Mattress Size Guide
Compare every standard mattress size — from Twin to California King — with exact dimensions, who each size is best for, and how they fit in real bedrooms. Expert guidance from LA Mattress Store, with 5 showrooms across Los Angeles and over a decade of helping people find the right fit.
Mattress Size Chart
All standard US mattress dimensions at a glance.
| Size | Dimensions | Best For | Sleeps | Key Benefit |
|---|---|---|---|---|
| Twin | 38" × 75" | Children, kids' rooms, bunk beds | 1 | Most affordable option |
| Twin XL | 38" × 80" | Teens, college dorms, taller adults | 1 | 5" longer than standard twin |
| Full | 54" × 75" | Single adults, guest rooms, smaller bedrooms | 1–2 | 16" wider than twin — more personal space |
| Queen | 60" × 80" | Couples, master bedrooms, most adults | 2 | Most popular mattress size in the US |
| King | 76" × 80" | Couples who want maximum space, larger bedrooms | 2 | Each partner gets twin XL of space |
| Cal King | 72" × 84" | Taller sleepers, large master bedrooms | 2 | 4" longer than standard king |
Mattress Sizes to Scale
See how each size compares visually — from Twin to California King.
Every Mattress Size, Explained
Dimensions, use cases, and who each size is really built for.
Twin Mattress Size
38 inches wide × 75 inches long
Best for: Children, kids' rooms, bunk beds
Room fit: Fits in rooms as small as 7' × 9'
- ✓Most affordable option
- ✓Fits small bedrooms easily
- ✓Ideal for kids ages 5–12
- ✓Standard for bunk beds
Consider: Too narrow for most adults; not ideal for taller sleepers
Ideal for: Children, single sleepers in small spaces, guest rooms on a budget
Shop Twin Mattresses →Twin XL Mattress Size
38 inches wide × 80 inches long
Best for: Teens, college dorms, taller adults
Room fit: Fits in rooms as small as 7' × 9' (with more length clearance)
- ✓5" longer than standard twin
- ✓Standard size for adjustable bases
- ✓Perfect for dorm rooms
- ✓Suits sleepers over 6 feet tall
Consider: Same narrow width as twin — not for couples or those who move around a lot
Ideal for: Taller teens, college students, adults in studios or smaller bedrooms
Shop Twin XL Mattresses →Full Mattress Size
54 inches wide × 75 inches long
Best for: Single adults, guest rooms, smaller bedrooms
Room fit: Recommended minimum room size: 10' × 10'
- ✓16" wider than twin — more personal space
- ✓Good for single adults who want room to move
- ✓Great for guest rooms
- ✓More affordable than queen
Consider: Can feel tight for two adults; shorter than queen by 5 inches
Ideal for: Single adults, guest rooms, teens upgrading from twin
Shop Full Mattresses →Queen Mattress Size
60 inches wide × 80 inches long
Best for: Couples, master bedrooms, most adults
Room fit: Recommended minimum room size: 10' × 10' (ideally 10' × 12')
- ✓Most popular mattress size in the US
- ✓Fits comfortably in most master bedrooms
- ✓Ample space for two adults
- ✓Wide selection of frames and bedding
Consider: May feel tight for couples who like maximum personal space
Ideal for: Couples, single adults who want generous space, master bedrooms
Shop Queen Mattresses →King Mattress Size
76 inches wide × 80 inches long
Best for: Couples who want maximum space, larger bedrooms
Room fit: Recommended minimum room size: 12' × 12' (ideally 13' × 13')
- ✓Each partner gets twin XL of space
- ✓Ideal for restless sleepers or couples with pets
- ✓Best for large master bedrooms
- ✓Premium sleep experience
Consider: Requires a large room; heavier and harder to move; premium pricing
Ideal for: Couples wanting maximum space, families with young children or pets in bed
Shop King Mattresses →Cal King Mattress Size
72 inches wide × 84 inches long
Best for: Taller sleepers, large master bedrooms
Room fit: Recommended minimum room size: 12' × 14'
- ✓4" longer than standard king
- ✓Best for sleepers over 6'2"
- ✓Elegant for large master suites
- ✓Distinctive and luxurious
Consider: 4" narrower than standard king; specialty bedding harder to find
Ideal for: Taller individuals (6'2"+), couples where one partner is very tall
Shop Cal King Mattresses →Which Mattress Size Is Right for You?
Match your situation to the right size in seconds.
Extra length prevents feet hanging off the edge.
Shop Twin XL, Queen, or Cal King →Full for small rooms; Queen for couples or taller guests.
Shop Full or Queen →Maximize floor space without sacrificing sleep quality.
Shop Twin, Twin XL, or Full →Premium space for the most important room in the house.
Shop King or Cal King →Size Comparisons
The most common size decisions, made simple.
Room Size Guide
Minimum and recommended bedroom dimensions for each mattress size. Always leave at least 24" of walkway clearance on the sides you access.
Leave at least 24" clearance on one side for access.
Same width as twin; slightly longer — ensure door clearance.
Works in most teen or guest bedrooms with modest furniture.
Ideal in bedrooms 10' × 12' or larger for comfortable walkways.
Need at least 24" on both sides and foot of bed for access.
Longer profile — ensure extra length clearance in room.
Mattress Size FAQ
Answers to the questions we hear most often.
Why Shop at LA Mattress Store
We deliver to your room, set up your mattress, and remove your old one — at no extra charge.
Sleep on it for 120 nights. If it's not right, we'll exchange it — no pressure, no hassle.
Flexible payment plans with fast approval. Sleep better now, pay over time.
Test every size in person at our showrooms in West LA, Koreatown, Studio City, Glendale, and La Brea.
Tempur-Pedic, Stearns & Foster, Diamond, Helix, and more — all in one place.
Our sleep consultants help you match the right size and feel to your sleep style and budget.
Ready to Find Your Size?
Shop online or visit any of our 5 LA showrooms and try every size in person — no appointment needed.