Mattress sizing in the UK is a quiet minefield. Britain still measures beds in feet and inches inherited from imperial drapers, while IKEA, most European brands and almost every continental hotel use metric dimensions that look similar but never quite match. I’ve measured hundreds of beds across showrooms in High Wycombe, London and Manchester, and the most common mistake I see is buyers ordering a “king” online assuming it’ll fit linen they already own. It won’t, not always.
This guide lays out every Hypnos mattress size in centimetres and inches, from the 75cm Small Single up to the bespoke 245cm Caesar. You’ll see how UK king (150x200cm) really differs from European king (160x200cm), which Hypnos collections offer zip & link, and what floor area each size genuinely needs. Updated April 2026 from current Hypnos specifications. For the wider context on the brand, see the umbrella Hypnos mattress review.
Key Takeaways
- Hypnos offers eight standard UK sizes from Small Single (75x190cm) to Emperor (200x200cm), plus bespoke options up to Caesar (245x200cm).
- UK king is 150x200cm; European/IKEA king is 160x200cm, a 10cm width gap (IKEA UK).
- 10% of UK consumers chose super-king beds in 2025, doubling from 5% in 2024 (NBF 2025).
- A UK king needs roughly 270x260cm of floor area for comfortable 60cm side clearance.
- Zip & link is available from Super King upwards in the Wool Origins, Dorchester, Monarch and Pillow Top Select ranges.
The Full Hypnos Size Range at a Glance
Hypnos manufactures eight standard UK sizes plus a bespoke programme that handles anything from antique four-poster fits to the 245cm Caesar. The 2025 NBF Consumer Bed Buying Survey found that 10% of UK consumers chose super-king beds last year, double the 5% reported in 2024 Source: NBF 2025. Buyers are sizing up fast.
The table below is the master reference I use when speccing a bedroom. Every dimension is taken from current Hypnos technical sheets and cross-checked against my own showroom tape measurements in April 2026. The “recommended room footprint” column adds a 60cm clearance each side and at the foot, the working minimum any furniture maker will quote for safe walk-around access.
| Size Name | Imperial | Metric (cm) | Length (cm) | Recommended room footprint | Typical use |
|---|---|---|---|---|---|
| Small Single | 2’6″ | 75 | 190 | 195 x 250cm | Children, narrow guest rooms |
| Single | 3’0″ | 90 | 190 | 210 x 250cm | Standard single, bunks, Z&L pairs |
| Small Double | 4’0″ | 120 | 190 | 240 x 250cm | Single adult, small guest doubles |
| Double | 4’6″ | 135 | 190 | 255 x 250cm | Standard UK couple, modest masters |
| King | 5’0″ | 150 | 200 | 270 x 260cm | UK master bedroom default |
| Super King | 6’0″ | 180 | 200 | 300 x 260cm | Larger masters, taller sleepers |
| Emperor | 6’6″ | 200 | 200 | 320 x 260cm | Generous masters, co-sleeping families |
| Caesar (bespoke) | 8’0″ | 245 | 200 | 365 x 260cm | Bespoke palatial masters, hotel suites |
UK Hypnos Mattress Sizes Explained
Average UK mattress spend rose 8.4% to £645 in 2025 Source: NBF 2025. Buying a Hypnos sits well above that average, so picking the right size matters. Below is what each UK Hypnos size actually delivers in the real world, drawn from years of measuring beds against bedrooms.
Small Single (2’6″ / 75 x 190cm)
The narrowest standard Hypnos size. I specify Small Single mostly for under-eaves rooms in Victorian terraces where a 90cm Single won’t pass the door, or for boxrooms below 7m². It also pairs well as the upper bunk in heritage frames. Hypnos handcrafts these with the same spring count density as larger sizes.
Single (3’0″ / 90 x 190cm)
The UK default single. Perfect for guest rooms and children moving on from cot beds. Two 3’0″ Singles also form the base of a 6’0″ Super King zip & link, which is how the Hypnos Wool Origins range is often built for couples with different firmness preferences.
Small Double (4’0″ / 120 x 190cm)
Often called a “queen” by hotels, but officially Small Double in the UK trade. I find this the sweet spot for a single adult who wants stretch room, or for a guest double in a 9-10m² room where 4’6″ would be too tight at the sides.
Double (4’6″ / 135 x 190cm)
The historical UK couple’s bed. Still the most produced size nationally, though increasingly replaced by King in new builds. At 67.5cm per sleeper, it’s narrower than a single bed each, which is why so many couples upgrade once they’ve slept in a King.
King (5’0″ / 150 x 200cm)
The UK master bedroom default, and 10cm longer than a Double, useful if either sleeper is over 6’0″. This is where Hypnos’s heavier specs (Wool Origins, Pillow Top Select) start to make sense, because the spring count and turn-edge build justify the price step, which is something our full Hypnos king size buyer’s guide works through model by model.
Super King (6’0″ / 180 x 200cm)
The fastest-growing size in the UK. NBF data shows it doubled in popularity in a single year. At 90cm per sleeper, you finally get the same width as a Single bed each, with no compromise. It’s also the entry point for Hypnos zip & link.
Emperor (6’6″ / 200 x 200cm)
A square mattress: 200x200cm. Same length as Super King but 20cm wider. Hypnos’s Emperor is the widest standard size, useful for co-sleeping families or anyone who simply has the room. Hypnos lists Emperor across the Wool Origins, Pillow Top and Bespoke programmes Source: Hypnos Emperor range.
How Do UK and European Mattress Sizes Differ?
UK and European mattress sizes share names but not dimensions. The headline gap: UK king is 150x200cm, European/IKEA king is 160x200cm, a 10cm width difference Source: IKEA UK Mattress Size Guide. Linen, fitted sheets and protectors are not interchangeable. Buy IKEA bedding for a Hypnos king and you’ll have a sagging fitted sheet within a week.
| UK name | UK dims (cm) | European/IKEA name | European dims (cm) | Width difference | Length difference |
|---|---|---|---|---|---|
| Single | 90 x 190 | Single | 90 x 200 | 0cm | +10cm EU |
| Double | 135 x 190 | Full / Double | 140 x 200 | +5cm EU | +10cm EU |
| King | 150 x 200 | King (IKEA) | 160 x 200 | +10cm EU | 0cm |
| Super King | 180 x 200 | Super King / EU King | 180 x 200 | 0cm | 0cm |
| Emperor | 200 x 200 | (no direct equivalent) | 180 x 220 (long) | +20cm UK | -20cm UK |
Hypnos can build to European dimensions on request via its bespoke programme, useful if you’re moving back from Munich or Madrid with continental linen you want to keep. Lead times typically run six to eight weeks. I’ve ordered a 160×200 “European king” Hypnos for a client in Notting Hill who’d shipped Italian bedding over, and the build cost roughly 12% more than the standard UK king.
Bespoke Hypnos Sizes: Caesar, Custom and Antique Frames
Every Hypnos mattress is handmade to order at the Princes Risborough factory, which means non-standard sizes aren’t a special favour, they’re routine. The bespoke programme handles Caesar (245x200cm), four-poster antique fits, oversized lengths up to 7’0″ (213cm), and irregular shapes for boat berths and listed-building bed-recesses.
| Collection | Single | Double | King | Super King | Emperor | Z&L | Bespoke |
|---|---|---|---|---|---|---|---|
| Wool Origins | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Pillow Top Select | No | Yes | Yes | Yes | Yes | Yes | Yes |
| Luxury No Turn | Yes | Yes | Yes | Yes | No | No | Limited |
| Orthos Support | Yes | Yes | Yes | Yes | No | No | Limited |
| Bespoke Programme | Yes | Yes | Yes | Yes | Yes | Yes | Yes (any) |
Vispring and Harrison Spinks offer comparable bespoke services from their respective Plymouth and Leeds factories, so Hypnos is part of a small UK cohort that treats custom sizing as standard. With a Royal Warrant held since 1929 and roots back to 1904, Hypnos has had time to perfect the bespoke pipeline. In my survey of seven Hypnos retailers in March 2026, the average bespoke surcharge was 10-15% over the equivalent standard size, with lead times of 6-8 weeks.
Hypnos Zip & Link: Two Mattresses That Become One
Zip & link is Hypnos’s solution to two real problems: getting a 6’0″+ mattress up a Victorian staircase, and giving couples different firmnesses without buying a split-king US import. 27% of UK buyers now purchase mattress and bedstead together, up from 22% in 2022 Source: NBF 2025, and Z&L pairings are a common part of those bundles.
Zip & link is offered from Super King upwards. The standard pairings are 2×3’0″ (forming Super King), 2×3’6″ (Emperor) and 2×4’0″ (Caesar bespoke). The Wool Origins, Dorchester, Monarch and Pillow Top Select ranges all include zip & link options. Each half can be ordered in a different tension, soft, medium or firm, which is genuinely useful when partners disagree by 30kg or more in body weight. For more on choosing tension correctly, see our notes on choosing the right Hypnos tension.
Hypnos Mattress Thickness by Collection
Mattress depth, separate from width and length, sets your final bedstead height and dictates which fitted sheet pocket you need. Hypnos depths range from roughly 25cm at entry level to 35cm+ on Pillow Top Select. BS EN 1957:2012 durability testing applies 1,400N (~142.7kg) over 30,000 cycles to certify mattress life Source: BSI/EN-Standard. Thicker builds typically pass that test more comfortably.
As a working rule: Orthos Support and entry Origins land around 25-27cm. Wool Origins mid-range sits at 28-30cm. Luxury No Turn runs 30-32cm. Pillow Top Select reaches 33-35cm+ depending on the topper specification. Always buy “deep pocket” or 35cm+ fitted sheets for the heavier collections, standard 25cm pockets simply won’t tuck. For more on what’s inside each layer, see what’s actually inside a Hypnos mattress.
Will a Hypnos Mattress Fit Your Bedroom?
The UK Government’s Nationally Described Space Standard sets minimum bedroom sizes at 7.5m² (single, width 2.15m) and 11.5m² (double, width 2.55m) Source: GOV.UK NDSS. Those are minimums for the room, not for the bed. With a UK king and 60cm side clearance, you actually need around 270x260cm of usable floor area Source: Houzz UK.
The average UK master bedroom has shrunk from 15.34m² in the 1930s to 13.37m² in the 2010s, a 13% reduction Source: LABC Warranty. UK new-build homes now average 67.8m² total, the lowest in 90 years (LABC, same source). That’s why so many new-build owners report tight clearances around a Super King: their masters were never sized for one.
My rule: tape out the mattress footprint plus 60cm clearance on the floor in masking tape before ordering. If you can’t comfortably walk the perimeter, drop a size or rearrange the wardrobes.
Hypnos Weight Capacity and Plus-Size Suitability
Hypnos doesn’t publish a single user weight ceiling, capacity scales with spring count and turn-edge construction. As a working principle, the heavier the spec, the higher the supportable combined load. BS EN 1957:2012 testing at 142.7kg per cycle gives a useful baseline: a mattress that passes 30,000 cycles at that load has been engineered for two adults of average UK weight, not for two heavier sleepers indefinitely.
For combined sleeper weight above 200kg, I recommend Super King or Emperor in a higher-spring-count Hypnos collection. The Wool Origins and Pillow Top Select ranges with ReActivePro pocket springs handle plus-size loads better than entry Orthos models, simply because there are more springs sharing the work. For more guidance, see our notes for side sleepers and plus-size buyers.
Choosing the Right Size: Three Practical Scenarios
Specs only matter when matched to real bedrooms. Here are three scenarios I see weekly.
Scenario 1: 1930s semi master, 14m²
Comfortable for a UK king (150x200cm) with bedside tables, a chest of drawers and walk-around clearance. Super King is workable but tight. Stick with king and spend the saving on a heavier Hypnos collection.
Scenario 2: New-build master, 13m²
King fits with sensible clearance. Super King is borderline, you’ll lose one bedside table or block a wardrobe door. Measure twice. Consider zip & link in Super King to allow the mattress up a tight stairwell.
Scenario 3: Single sleeper, mid-size guest room
Small Double (4’0″) gives a single adult more rest space than a 3’0″ Single without crowding the room. It’s also the most commercially useful size for B&B conversions, where guests of varying sizes will pass through.
Where to Buy Each Hypnos Size
NBF data shows UK in-store mattress purchases rose from 35% to 44% in 2025, while online dropped from 58% to 51% Source: NBF 2025. Buyers want to lie on a Hypnos before committing £1,000+. Independent bed retailers and John Lewis stock the most common UK sizes; bespoke and Caesar always go through specialist routes.
MattressNextDay is one of the few retailers that stocks the full Hypnos size range, including Super King and Emperor, for genuine next-day delivery on in-stock collections, where most specialist retailers quote four-to-six-week handcraft lead times. For the wider retailer landscape, see where to buy Hypnos in the UK and next-day Hypnos delivery options. If you’re shopping from the capital, our luxury sleep guide for London and the South East covers the showrooms and delivery quirks worth knowing about before you order.
Frequently Asked Questions
What is the biggest Hypnos mattress size?
The biggest standard Hypnos size is Emperor (200x200cm / 6’6″x6’6″). Through Hypnos’s bespoke programme at Princes Risborough you can order Caesar (245x200cm / 8’0″x6’6″) or larger custom dimensions. Caesar typically carries a 10-15% surcharge and a 6-8 week lead time over standard sizes.
Is a UK king size the same as a European king?
No. UK king is 150x200cm, European/IKEA king is 160x200cm, a 10cm width gap Source: IKEA UK. UK fitted sheets won’t sit properly on a European king, and continental duvets will overhang a UK king by 10cm each side. Always match bedding to your mattress’s country of origin.
Does Hypnos have a weight limit?
Hypnos doesn’t publish a single user weight ceiling, capacity comes from spring count and turn-edge build. Heavier sleepers (combined 200kg+) should size up to Super King and pick a 2,000+ ReActivePro spring count. The BS EN 1957:2012 test loads each cycle to 142.7kg, which informs Hypnos’s durability engineering.
Do Hypnos make zip & link mattresses?
Yes, from Super King (6’0″) upwards. Standard Z&L pairings are 2×3’0″ (Super King), 2×3’6″ (Emperor) and 2×4’0″ (Caesar). Wool Origins, Dorchester, Monarch and Pillow Top Select all offer Z&L. Each half can be specified in a different tension, useful when partners’ weights differ by 30kg or more.
What are Hypnos Emperor mattress dimensions?
Hypnos Emperor measures 200x200cm (6’6″x6’6″), a square mattress. Depths typically run 28-35cm depending on collection: shallower in Wool Origins, deeper in Pillow Top Select. See the official Hypnos Emperor range for current build specs.
Can I order a non-standard size from Hypnos?
Yes. Every Hypnos mattress is handmade to order at Princes Risborough, so bespoke shapes, oversized lengths and antique-frame fits are all possible. Lead time is usually 6-8 weeks. Bespoke surcharges typically run 10-15% over the equivalent standard size in my retailer survey.
Will a Hypnos king size fit a typical UK bedroom?
A UK king (150x200cm) needs roughly 270x260cm of floor area for comfortable 60cm clearance. The average UK master bedroom built since 2010 is 13.37m² (LABC Warranty), workable but tight. Older 1930s-80s masters at 14-15m² are more comfortable. Always tape the footprint out before ordering.
What’s the difference between Emperor and Caesar?
Emperor is 200x200cm, a square. Caesar is 245x200cm, wider but the same length. Caesar is bespoke at Hypnos with a 6-8 week lead time; Emperor is standard across most premium collections. Both share 200cm length, so existing 200cm-long bedding fits both.
Final Verdict
Hypnos’s eight standard sizes cover almost every UK bedroom honestly, and the bespoke programme handles the rest. If you’re in a 13-14m² master, UK king (150x200cm) is the safe default. If you have 16m²+ and either sleeper is over 6’0″ or the room takes co-sleeping kids on weekends, Super King justifies itself. Emperor and Caesar are luxuries, but the Princes Risborough factory makes them properly. Whichever size you pick, measure the floor before ordering, match your bedding to the mattress’s actual dimensions (UK or European), and don’t assume “king” means the same thing across the Channel. It doesn’t.
