Complete Global Reference
The Complete Oversized Bed Size Guide
Every oversized bed size explained — from the Emperor and Caesar to custom Family Beds. Measurements in inches and centimetres, with room size recommendations and honest assessments of each option.
Last reviewed: March 2026
Important: UK bed sizes are not standardized
Terms like "Emperor" and "Caesar" have no official standard in the UK. An Emperor bed from one retailer may be 200 × 200 cm, while another sells it as 213 × 213 cm or even 215 × 215 cm. Always verify the exact centimetre dimensions before purchasing.
Visual Size Comparison
See how each bed size compares at scale. The boxes below represent the relative proportions of each bed.
Proportions are accurate; absolute sizes are reduced to fit screen. FAMBED® shown at maximum width with dashed border indicating flexible sizing.
Detailed Size Breakdown
All oversized bed sizes organized by market region, with measurements, room requirements, and our honest assessment.
FAMBED® Custom System
The only brand offering unlimited width flexibility with a complete bed system
Any width from 200 to 360 cm — you choose the exact size
Width Range
200–360 cm (79"–142")
Standard Length
200 cm (79")
Area
4.0–7.2 m² / 43–78 sq ft
Min. Room
Varies by width
The only brand offering truly custom widths — from 200 to 360 cm in 10 cm increments (metric), or 96", 108", 126", 144", and 162" (imperial, from upcoming US production). A complete continental bed system is included in the price. Ships worldwide from Europe, with domestic US production coming soon for faster North American delivery.
Metric Bed Sizes (cm)
Popular European bed sizes specified in centimeters — commonly searched dimensions for family and oversized beds
180×200 cm
Also known as: Super King / Queensize XL
Metric
180 × 200 cm
Imperial
71" × 79"
Area
3.6 m²
Min. Room
3.7 × 3.7 m
The European Super King equivalent — popular in Germany, Scandinavia, and the UK as the largest standard size.
Ideal for: Couples wanting more space than a standard king
200×200 cm
Also known as: Emperor / Square King
Metric
200 × 200 cm
Imperial
79" × 79"
Area
4.0 m²
Min. Room
3.7 × 3.7 m
A square bed offering equal space for both sleepers — the Emperor size in many European markets.
Ideal for: Couples who want generous, symmetrical sleeping space
200×220 cm
Also known as: Long Emperor
Metric
200 × 220 cm
Imperial
79" × 87"
Area
4.4 m²
Min. Room
4.0 × 4.0 m
Extra length for taller sleepers while maintaining 200 cm width — popular in Poland and the Netherlands.
Ideal for: Tall couples who need extra legroom
220×200 cm
Also known as: Wide Emperor
Metric
220 × 200 cm
Imperial
87" × 79"
Area
4.4 m²
Min. Room
4.0 × 4.0 m
Wider than Emperor but standard length — the entry point for family co-sleeping.
Ideal for: Small families or couples who want extra width
240×200 cm
Also known as: Standard Family Bed
Metric
240 × 200 cm
Imperial
94" × 79"
Area
4.8 m²
Min. Room
4.0 × 4.0 m
The standard European family bed width — ideal for parents with one young child.
Ideal for: Families of three who co-sleep
250×200 cm
Also known as: Family Bed
Metric
250 × 200 cm
Imperial
98" × 79"
Area
5.0 m²
Min. Room
4.0 × 4.0 m
A popular mid-range family bed size offering a bit more space than 240 cm.
Ideal for: Families wanting slightly more room than the standard family bed
260×200 cm
Also known as: Large Family Bed
Metric
260 × 200 cm
Imperial
102" × 79"
Area
5.2 m²
Min. Room
4.3 × 4.3 m
A generous family bed width — comfortable for parents with one or two children.
Ideal for: Families of three to four
270×200 cm
Also known as: Large Family Bed
Metric
270 × 200 cm
Imperial
106" × 79"
Area
5.4 m²
Min. Room
4.3 × 4.3 m
A large family bed — one of the most popular sizes in Germany and the Netherlands.
Ideal for: Families of four who co-sleep regularly
280×200 cm
Also known as: XL Family Bed
Metric
280 × 200 cm
Imperial
110" × 79"
Area
5.6 m²
Min. Room
4.3 × 4.3 m
An extra-large family bed providing ample space for the whole family.
Ideal for: Families of four seeking maximum comfort
300×200 cm
Also known as: XXL Family Bed
Metric
300 × 200 cm
Imperial
118" × 79"
Area
6.0 m²
Min. Room
4.6 × 4.6 m
The XXL family bed — three meters of sleeping width for the ultimate family experience.
Ideal for: Large families or those wanting maximum space
320×200 cm
Also known as: Mega Family Bed
Metric
320 × 200 cm
Imperial
126" × 79"
Area
6.4 m²
Min. Room
4.6 × 4.6 m
A mega family bed for families who want extraordinary sleeping space.
Ideal for: Families of five or those who value extreme space
360×200 cm
Also known as: Ultra Family Bed
Metric
360 × 200 cm
Imperial
142" × 79"
Area
7.2 m²
Min. Room
4.9 × 4.9 m
The largest standard family bed size — nearly 12 feet of sleeping width.
Ideal for: Large families seeking the ultimate co-sleeping experience
Imperial Bed Sizes (inches)
Popular bed sizes specified in inches — commonly searched dimensions in the US and UK markets
72×84 in
Also known as: California King
Metric
183 × 213 cm
Imperial
72" × 84"
Area
3.9 m²
Min. Room
3.7 × 3.7 m
The California King dimensions — narrower but longer than a standard King. Popular for tall sleepers.
Ideal for: Tall individuals or couples in narrow bedrooms
76×80 in
Also known as: Standard King (US)
Metric
193 × 203 cm
Imperial
76" × 80"
Area
3.9 m²
Min. Room
3.7 × 3.7 m
The standard US King dimensions — the baseline for oversized bed comparisons.
Ideal for: Couples seeking a standard upgrade from Queen
84×84 in
Also known as: Wyoming King / Emperor
Metric
213 × 213 cm
Imperial
84" × 84"
Area
4.5 m²
Min. Room
4.0 × 4.0 m
Wyoming King / Emperor dimensions — a perfect 7-foot square offering generous space for couples and families.
Ideal for: Couples with pets or a young child, or those wanting extra space
80×98 in
Also known as: Texas King
Metric
203 × 249 cm
Imperial
80" × 98"
Area
5.1 m²
Min. Room
4.0 × 4.3 m
Texas King dimensions — exceptionally long at over 8 feet, designed for very tall sleepers.
Ideal for: Very tall individuals or couples who need extra length
96×96 in
Also known as: Alberta King
Metric
244 × 244 cm
Imperial
96" × 96"
Area
6.0 m²
Min. Room
4.3 × 4.3 m
Alberta King dimensions — an 8-foot square bed offering massive space for families.
Ideal for: Families of 3-4 who co-sleep regularly
108×108 in
Also known as: Alaskan King
Metric
274 × 274 cm
Imperial
108" × 108"
Area
7.5 m²
Min. Room
4.6 × 4.6 m
Alaskan King dimensions — the largest named square bed at 9 feet per side.
Ideal for: Large families or those wanting the ultimate sleeping space
120×80 in
Also known as: Family Bed (10ft)
Metric
305 × 203 cm
Imperial
120" × 80"
Area
6.2 m²
Min. Room
4.3 × 4.9 m
A 10-foot wide family bed — extremely wide for maximum co-sleeping comfort.
Ideal for: Families of 4-5 who want everyone in one bed
96×80 in
Also known as: FAMBED® 8ft
Metric
244 × 203 cm
Imperial
96" × 80"
Area
5.0 m²
Min. Room
4.0 × 4.3 m
108×80 in
Also known as: FAMBED® 9ft
Metric
274 × 203 cm
Imperial
108" × 80"
Area
5.6 m²
Min. Room
4.3 × 4.3 m
126×80 in
Also known as: FAMBED® 10.5ft
Metric
320 × 203 cm
Imperial
126" × 80"
Area
6.5 m²
Min. Room
4.6 × 4.6 m
144×80 in
Also known as: Family Size (12ft)
Metric
366 × 203 cm
Imperial
144" × 80"
Area
7.4 m²
Min. Room
4.9 × 5.5 m
A 12-foot wide family bed — the widest standard bed size available.
Ideal for: Large families seeking the ultimate co-sleeping experience
162×80 in
Also known as: FAMBED® 13.5ft (largest)
Metric
411 × 203 cm
Imperial
162" × 80"
Area
8.3 m²
Min. Room
5.5 × 5.5 m
Standard Reference Sizes
The baseline sizes most people are familiar with
Standard King (US)
Also known as: Eastern King
Metric
193 × 203 cm
Imperial
76" × 80"
Area
3.9 m²
Min. Room
3.7 × 3.7 m
The baseline for comparison. A standard US King gives each partner about 38 inches of width — less than a Twin XL bed. This is where most couples start before realizing they need more space.
Ideal for: Couples without children or pets in the bed
California King
Also known as: Cal King, Western King
Metric
183 × 213 cm
Imperial
72" × 84"
Area
3.9 m²
Min. Room
3.7 × 3.7 m
Actually narrower than a standard King but 4 inches longer. Designed for tall sleepers, not for extra width. A common misconception is that it's bigger — it's not.
Ideal for: Tall individuals (6'2"+) who sleep alone or as a couple
United Kingdom Sizes
UK-specific oversized bed terminology — note that exact dimensions vary between retailers
Super King (UK)
Also known as: King Size (EU equivalent)
Metric
180 × 200 cm
Imperial
72" × 78"
Area
3.6 m²
Min. Room
3.7 × 3.7 m
The largest standard size available in the UK high street. At 180 × 200 cm, it's the starting point for UK couples who want more space. Widely available from all major UK retailers.
Ideal for: UK couples wanting the largest standard option
Eastern King (UK)
Also known as: King Size XL
Metric
200 × 200 cm
Imperial
79" × 79"
Area
4.0 m²
Min. Room
3.7 × 3.7 m
A 200 × 200 cm square bed — a step up from the Super King. Some UK retailers call this an Emperor, which creates confusion. Always check the exact dimensions.
Ideal for: UK couples wanting more width than Super King
Emperor (UK)
Also known as: Varies: 200×200 or 213×213 cm
Metric
213 × 213 cm
Imperial
84" × 84"
Area
4.5 m²
Min. Room
4.0 × 4.0 m
The Emperor size is notoriously inconsistent in the UK. Some retailers define it as 200 × 200 cm, others as 213 × 213 cm, and some as 215 × 215 cm. Always verify the exact dimensions before purchasing. At its largest definition, it's equivalent to a US Wyoming King.
Ideal for: UK families wanting significantly more space
Caesar (UK)
Also known as: Super Emperor
Metric
220 × 220 cm
Imperial
87" × 87"
Area
4.8 m²
Min. Room
4.3 × 4.3 m
The Caesar is the next step above Emperor in the UK sizing hierarchy. At 220 × 220 cm, it provides meaningful extra space. Some retailers also offer a 245 × 213 cm variant. Availability is limited to specialist retailers like The Big Bed Company and Endurance Beds.
Ideal for: UK families with 1-2 children, or couples who want luxury space
Super Caesar (UK)
Metric
282 × 226 cm
Imperial
111" × 89"
Area
6.4 m²
Min. Room
4.6 × 4.6 m
The largest named UK bed size, offered by specialist makers like Get Laid Beds. At 282 × 226 cm, it approaches Alaskan King territory. Extremely limited availability — essentially a custom order from specialist UK manufacturers.
Ideal for: UK families wanting the absolute largest available option
US Oversized Sizes
Named oversized bed sizes primarily used in the American market
Wyoming King
Metric
213 × 213 cm
Imperial
84" × 84"
Area
4.5 m²
Min. Room
4.0 × 4.0 m
The entry point to truly oversized beds in the US market. A perfect square that gives each partner 42 inches of width — a meaningful upgrade from the standard King. Equivalent to the UK Emperor at its largest definition.
Ideal for: Couples who want more space, or a couple + one child
Texas King
Metric
203 × 249 cm
Imperial
80" × 98"
Area
5.1 m²
Min. Room
4.0 × 4.3 m
Designed for very tall sleepers. The Texas King is longer than it is wide, making it ideal for height rather than co-sleeping width. At 249 cm long, it accommodates sleepers up to 7 feet tall.
Ideal for: Very tall individuals (6'4"+) or couples where one partner is tall
Alberta King
Also known as: Vermont King
Metric
244 × 244 cm
Imperial
96" × 96"
Area
6.0 m²
Min. Room
4.3 × 4.3 m
A massive 8×8 foot square bed. Significantly larger than a Wyoming King, offering 48 inches per partner — more than a full Twin XL each. Similar to the UK Caesar in total area.
Ideal for: Families with 1-2 children, or couples who want luxury space
Alaskan King
Metric
274 × 274 cm
Imperial
108" × 108"
Area
7.5 m²
Min. Room
4.6 × 4.6 m
The iconic 9×9 foot bed and the most well-known oversized bed size globally. Offers extraordinary space — but its square shape can be impractical for standard rectangular bedrooms. Delivery of a one-piece mattress this size is extremely challenging.
Ideal for: Large families (2 adults + 2-3 children), luxury master suites
Family Bed (10ft)
Metric
305 × 203 cm
Imperial
120" × 80"
Area
6.2 m²
Min. Room
4.3 × 4.9 m
A 10-foot wide bed designed specifically for family co-sleeping. The rectangular shape fits better in standard rooms than square alternatives. Available from brands like The Bedding Mart.
Ideal for: Families with 2-3 children who want to co-sleep
Family Size® (12ft)
Also known as: Ace Size
Metric
366 × 203 cm
Imperial
144" × 80"
Area
7.4 m²
Min. Room
4.9 × 5.5 m
The largest standard bed size available anywhere. At 12 feet wide, this is nearly twice the width of a standard King. Logistics are extremely challenging — this is essentially a novelty/luxury product.
Ideal for: Very large families, novelty/luxury installations
European Family Bed Standards
Common family bed widths in the German, Austrian, and Dutch markets
Familienbett 240 cm
Also known as: European Family Bed Standard
Metric
240 × 200 cm
Imperial
94" × 79"
Area
4.8 m²
Min. Room
4.0 × 4.0 m
The most common family bed width in the German-speaking and Dutch markets. Typically created by combining three 80 cm mattresses or two 120 cm mattresses. Available from dozens of European brands including Ehrenkind, RIMA, BettKonzept, Kok Bedden, and many more.
Ideal for: European families with 1 child, or couples wanting generous space
Familienbett 270 cm
Also known as: Large European Family Bed
Metric
270 × 200 cm
Imperial
106" × 79"
Area
5.4 m²
Min. Room
4.3 × 4.3 m
The second most popular family bed width in continental Europe. Provides similar total area to an Alaskan King but in a practical rectangular shape. Available from brands like Ehrenkind, RIMA, BettKonzept, Liegewiese, and Massiefhoutenbed.
Ideal for: European families with 1-2 children
Familienbett 300 cm
Also known as: XL European Family Bed
Metric
300 × 200 cm
Imperial
118" × 79"
Area
6.0 m²
Min. Room
4.6 × 4.6 m
The largest commonly available European family bed width. At 3 meters wide, it provides exceptional space for larger families. Available from brands like BettKonzept, Sgaap, ROOM IN A BOX, and Massiefhoutenbed.
Ideal for: European families with 2-3 children
Regional Size Standards
"King Size" means different things in different countries. This table shows what the largest standard and oversized options are in each market.
| Region | King Size Equivalent | Largest Available | Note |
|---|---|---|---|
| USA | 76″ × 80″ (193 × 203 cm) | Alaskan King 108″ × 108″ | Named sizes (Wyoming, Texas, Alberta, Alaskan) |
| United Kingdom | Super King 180 × 200 cm | Super Caesar ~282 × 226 cm | Emperor/Caesar sizes vary by retailer |
| Germany / Austria | 180 × 200 cm | Familienbett up to 360 cm wide | Modular family beds in 240/270/300 cm widths |
| Netherlands | 180 × 200 cm | Familiebed up to 360 cm wide | Strong family bed culture, many local brands |
| Denmark | 210 × 210 cm | FAMBED® up to 360 cm wide | Danish King Size is 210×210 — larger than most countries |
| France | 180 × 200 cm | Empereur 200 × 200 cm (standard) | Limited oversized options beyond 200 cm |
| Spain | 200 × 200 cm | Cama familiar 240 × 200 cm | Spanish King is already 200 cm wide |
| Italy | 180 × 200 cm | Custom up to 400 × 400 cm (Hästens) | Uses 'piazze' (places) system for capacity |
| Poland | 200 × 220 cm | 270 cm wide (custom) | Polish King Size is longer at 220 cm |
| Scandinavia (SE/NO) | 180 × 200 cm | FAMBED® up to 360 cm wide | Familjesäng can also mean bunk bed with wide lower bunk |
International Bed Size Terminology
Oversized beds go by different names around the world. Use this table to find the right search terms for your country.
| English | Danish | German | French | Spanish | Dutch | Italian | Swedish | Polish | Norwegian |
|---|---|---|---|---|---|---|---|---|---|
| Family Bed | Familieseng | Familienbett | Lit familial | Cama familiar | Familiebed | Letto familiare | Familjesäng | Łóżko rodzinne | Familieseng |
| Co-sleeping Bed | Samsovningsseng | Co-Sleeping Bett | Lit de co-dodo | Cama de colecho | Co-sleeping bed | Letto cosleeping | Samsovningssäng | Współspanie | Samsovingsseng |
| Oversized Bed | Ekstra stor seng | Übergroßes Bett / XXL Bett | Lit surdimensionné / Lit XXL | Cama extra grande / Cama XXL | XXL bed / Extra groot bed | Letto XXL / Letto extra large | Överdimensionerad säng | Wielkie łóżko | Storseng |
| King Size | 210 × 210 cm | 180 × 200 cm | 180 × 200 cm | 200 × 200 cm | 180 × 200 cm | 180 × 200 cm | 180 × 200 cm | 200 × 220 cm | 180 × 200 cm |
| Super King (UK) | — | Super Kingsize | King Size XL | — | Kingsize XL | Super King Size | — | — | — |
| Emperor (UK) | — | — | Empereur | — | — | — | — | — | — |
| Caesar (UK) | — | — | — | — | — | — | — | — | — |
| Three-person bed | — | — | — | — | — | Letto a tre piazze | — | — | — |
Not Sure Which Size Is Right?
FAMBED® is the only brand that lets you choose your exact width — from 200 cm to 360 cm in 10 cm increments. No need to commit to a fixed size. Ships worldwide.
Configure Your FAMBED®