Full Size Mattress Dimensions: How Wide and Long Are They?

What Are Full Size Mattress Dimensions?

A standard full size mattress measures:

54 inches wide × 75 inches long (approximately 137 cm × 191 cm).

This size provides ample width for one adult while remaining compact enough to fit comfortably in smaller bedrooms or apartments.

Mattress Size	Width	Length	Best For
Twin	38”	75”	Kids, bunk beds
Twin XL	38”	80”	Teenagers, taller sleepers
Full	54”	75”	Single adults, guest rooms
Full XL	54”	80”	Tall adults
Queen	60”	80”	Couples
King	76”	80”	Couples with space
California King	72”	84”	Tall couples

History and Purpose of Full Mattresses

The full or double mattress was once the most common size for couples before the queen and king sizes became mainstream in the mid-20th century. It offered a reasonable width for two sleepers at a time when bedrooms were smaller.

Today, the full mattress serves a new role offering luxury for solo sleepers or space-saving comfort for smaller living spaces. Its balance of comfort and practicality makes it a favorite in guest bedrooms, dorms, and studio apartments.

Who Should Choose a Full Size Mattress?

A full size mattress isn’t for everyone but for the right sleeper, it’s a perfect match.

Ideal For:

• Single adults who want extra width compared to a twin.
• Teenagers transitioning from a twin bed.
• Guest rooms where versatility matters.
• Studio apartment dwellers needing a mix of comfort and compactness.
• Pet owners who share their bed with small pets.

Not Ideal For:

• Couples as each person only gets about 27 inches of personal space.
• Taller sleepers (over 6’2”) who may find the 75” length restrictive.

Comparison Table

Feature	Full	Full XL	Queen	Twin XL
Width	54"	54"	60"	38"
Length	75"	80"	80"	80"
Sleeping Capacity	1 adult	1 tall adult	2 adults	1 tall teen/adult
Room Size Fit	10’x10’	10’x10’	10’x12’	9’x9’
Price Range	$$	$$+	$$$	$$
Ideal For	Singles, teens	Taller singles	Couples	Dorms

Quick Tip: If you’re taller than 6 feet but want to keep your mattress compact, the Full XL is worth considering. Many models are available at Mattress Stores Los Angeles, combining comfort with smart space use.

Factors to Consider When Buying a Full Mattress

When shopping for a full mattress, focus on these five critical factors to ensure you get the best sleep experience:

1. Room Size

A full mattress fits best in rooms measuring at least 10x10 feet. It allows for bedside tables and movement space.

2. Sleeping Position

• Side sleepers need contouring and pressure relief opt for memory foam or hybrid models.
• Back sleepers prefer balanced support go for medium-firm hybrids or latex.
• Stomach sleepers benefit from firmer innerspring mattresses to maintain spinal alignment.

3. Body Type

Heavier sleepers may prefer firmer or hybrid designs for support, while lighter individuals may enjoy softer foams.

4. Material & Cooling

Latex and gel-infused foams enhance airflow ideal for warm climates like Southern California.

5. Budget & Durability

Expect full mattresses to range from $500 to $2,000, depending on brand and construction. High-quality models at Mattress Stores Los Angeles often include long warranties and durable materials.

Material Types and How They Affect Comfort

Mattress Type	Description	Best For	Lifespan
Memory Foam	Adapts to body shape for contouring comfort.	Side sleepers, pressure relief.	7–10 years
Latex	Natural, bouncy, and breathable.	Hot sleepers, eco-conscious buyers.	10–12 years
Hybrid	Combines coils with foam or latex.	Balanced support and comfort.	8–10 years
Innerspring	Traditional coil support system.	Back and stomach sleepers.	6–8 years

Visual Graph

Below is a conceptual comparison of support vs. contouring performance among different full mattress materials.

This visualization demonstrates the tradeoff between firm support and body-conforming softness.

Product Review

1. Full – Spring Air Value Collection Olive Firm 8" Mattress

Overview:

The Olive Firm 8″ mattress is a budget-friendly innerspring model from Spring Air’s Value Collection, offering a true firm feel in a compact 8-inch profile ideal for guest rooms, small bedrooms or bunk beds. It uses a 6″, 460-count VertiCoil support system combined with a firm foam quilt and densified fiber layers to deliver consistent support and minimal sink-in. The cover is a breathable knit fabric and the mattress includes a natural fire-resistant fiber barrier (avoiding harsh chemicals) plus a 10-year warranty.

Key Features:Firm support designed to promote proper spinal alignment and reduce pressure points.

• Compact 8″ profile suitable for bunk beds, trundles, kids/teens rooms, or anywhere where head-space is limited.
• 6″ VertiCoil support system with 460 coils (vertically oriented) for consistent support and reduced motion transfer.
• Firm foam quilt + densified fiber surface for durable structure and a stable sleep surface.
• Natural fire-resistant fiber barrier (instead of heavy chemical FR treatments) and a durable knit fabric cover.
• 10-year warranty included.
• Available in a range of sizes (Twin, Twin XL, Full, Queen, King, CA King) with quite affordable pricing for the size.

Pros & Cons:

Pros	Cons
Very good value for money budget-minded option from a known brand.	Only 8″ height may feel too shallow or less “plush” compared to thicker mattresses.
Firm support which is good for back and stomach sleepers, or anyone who prefers minimal sink-in.	Edge support is noted to not include premium features (no foam-encased edge) which may reduce usable sleeping surface at the edges.
Compact profile makes it suitable for bunk beds, trundles, kids rooms, or smaller bedrooms.	The firmer surface may not be ideal for side sleepers or heavier sleepers who prefer more cushion or contouring.
Use of natural fire-resistant barrier is a plus from a safety/chemical exposure perspective.	Limited comfort layers for sleepers who want more “luxury” feel (memory foam, thick pillow top) this may feel too basic.
Comes with a 10-year warranty decent for the price/category.	Being a value collection model, long-term durability (10+ years) might not match high-end models with more advanced materials.
Trusted brand name (Spring Air) and a known retailer offering 120-night trial and free delivery in some cases.	Availability may be limited to certain regions/retailers (here a Los Angeles retailer) so may incur shipping/returns trade-offs outside that area.

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2. Full – Diamond Justice Medium Tight Top 7" Mattress

Overview:

The Justice Euro Top is a budget-friendly innerspring mattress offering a classic crown: a plush Euro-top comfort layer over a traditional coil support system. It is described as having a medium-firm feel, providing both cushioning and support, making it suitable for everyday use at a value price point. The build emphasises affordable comfort for guest rooms or cost-conscious buyers who still want a recognized brand and decent construction.

Key Features:

• Euro Top Comfort Layer: Adds a cushioning layer sewn flush with the mattress edge to give a softer surface feel without sacrificing the underlying support.
• Traditional Innerspring Support: Uses a coil system (likely Bonnell or similar) to deliver responsiveness, airflow, bounce and edge stability.
• Edge-to-Edge Stability: Reinforced edges help maximise usable sleeping surface and reduce sagging at the perimeter.
• Breathable Quilted Fabric Cover: A soft stretch-knit style cover helps with surface comfort and heat/airflow management.
• Adjustable Base Compatible: The mattress is compatible with power bases, giving flexibility for adjustable bed setups.
• 10-Year Limited Warranty: Comes with a warranty from Diamond Mattress covering workmanship and materials for long-term support.

Pros & Cons:

Pros	Cons
Provides a good value for money solid brand with decent features at an affordable price.	As a value model, the materials (coil count, comfort layer depth) may be more basic compared to premium mattresses.
Euro top adds extra comfort over a bare tight-top coil mattress better cushioning for pressure relief.	The “medium-firm” feel may be too firm for side sleepers or those who prefer deep contouring or plush softness.
Edge-to-edge support is a plus for couples or those who tend to sleep near the edge of the bed.	Because it is an innerspring with a Euro top rather than high-density foam/hybrid, it may not offer the same level of motion isolation as foam-based or pocket-coil mattresses.
Good compatibility with adjustable bases adds flexibility in bed setup.	In deep usage (10+ years), value models sometimes show more sagging or wear than premium ones, especially if heavy sleepers use them.
From a trusted brand and includes a 10-year warranty instills a degree of durability confidence.	May not provide the “luxury hotel‐feel” or advanced cooling/foam features of higher-end mattresses; comfort layer may be thinner.

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Conclusion

A full size mattress offers a sweet spot between comfort and space-saving efficiency. It’s ideal for:

• Solo sleepers who value space to stretch out.
• Teenagers upgrading from smaller beds.
• Guest rooms where versatility is key.
• For taller individuals or couples, a queen or full XL may be a better fit.

At Mattress Stores Los Angeles, you’ll find full mattresses across every material type and firmness level allowing you to experience comfort that’s tailored perfectly to your lifestyle and sleeping preferences.

FAQs

1. What are the exact dimensions of a full size mattress?

A standard full mattress measures 54 inches wide by 75 inches long.

2. Is a full mattress the same as a double?

Yes, “full” and “double” refer to the same size mattress.

3. Can two adults sleep on a full mattress?

Technically yes, but it’s a tight fit each person only gets 27 inches of space.

4. What’s the difference between full and full XL?

A full XL adds 5 extra inches of length (80" instead of 75"), ideal for taller sleepers.

5.Will full sheets fit a full XL bed?

No full XL mattresses require full XL sheets due to the length difference.

6. What room size fits a full mattress best?

A room of at least 10x10 feet is ideal for comfortable placement.

7. Is a full mattress good for kids or teens?

Absolutely. It provides ample space for growing teens and young adults.

8. How much does a full mattress weigh?

Depending on material, between 50–90 pounds on average.

9. How long does a full mattress last?

High-quality full mattresses typically last 8–10 years, depending on material and maintenance.

10. Where can I buy a full size mattress in Los Angeles?

You can explore premium full mattresses at Mattress Stores Los Angeles offering local delivery, setup, and comfort guarantees.