UK vs Irish Bed Sizes: What’s the Difference
UK and Irish bed sizes are largely the same for most standard dimensions, with both following very similar metric measurements. However, subtle differences in labelling, availability of certain sizes and occasional use of EU variants can create confusion for shoppers in Northern Ireland or those buying across the Irish border. This guide sets out the exact centimetre and feet measurements, highlights where differences occur and gives practical checklists to ensure the bed or mattress you order will fit.
Standard UK Bed and Mattress Sizes
The UK uses these fixed sizes for beds and mattresses:
- Small single: 75x190cm (2ft6)
- Single: 90x190cm (3ft)
- Small double: 120x190cm (4ft)
- Double: 135x190cm (4ft6)
- King: 150x200cm (5ft)
- Super king: 180x200cm (6ft)
These dimensions apply to both the bed frame and the mattress. Mattresses must meet UK fire-safety rules under BS 7177. Always confirm the exact depth allowed by any bed frame before purchase.
Irish Bed Sizes and How They Compare
Ireland uses the identical metric sizes listed above for most domestic beds. The main practical differences are occasional marketing as “Irish double” for the 135x190cm size and greater availability of EU sizes in some Republic of Ireland retailers. EU double is 140x200cm and EU single is 90x200cm. These are 5–10cm longer or wider than standard UK versions and will not fit a UK-sized bed frame or vice versa. Northern Ireland primarily follows UK sizing, but cross-border purchases can result in mismatched items if the origin is not checked.
Key Size Differences That Matter for Cross-Border Buyers
The table below shows direct comparisons:
| Size Name | UK Dimensions | Common Irish / EU Variant | Practical Impact |
|---|---|---|---|
| Single | 90x190cm | 90x200cm (EU) | 10cm extra length; may overhang UK base |
| Double | 135x190cm | 140x200cm (EU double) | 5cm wider and 10cm longer; requires different frame |
| King | 150x200cm | Usually matches UK | Generally interchangeable |
| Super King | 180x200cm | Usually matches UK | Generally interchangeable |
Use this table as a decision rule: if the product description says “EU” or gives 140x200cm, it will not fit a standard UK 4ft6 double bed frame. Measure your existing frame or room space in centimetres before ordering.
Children’s Bed Sizes: UK vs Ireland
Cot mattresses are the same in both markets at 60x120cm. Cot bed and toddler beds are 70x140cm in both UK and Ireland. For older children, UK single (90x190cm) remains the standard in Northern Ireland. Bunk beds sold in the UK must meet BS EN 747; the top-bunk guard rail must rise at least 16cm above the mattress surface, so use the maximum mattress depth stated by the maker. Top bunks are not recommended for children under 6. Shop the full range of standard bunk beds that comply with these rules.
Recommended Kids Options for Consistent Sizing
The Flair Montana Captain's Guest Bed works on standard UK single size and offers flexible guest space without size mismatch risk. For younger children the Flair Ava Boucle Single Bed Pink uses the exact 90x190cm single footprint found on both sides of the border. The Recoil Shuttle Gaming Bunk Bed Black & Red meets BS EN 747 and is built for the UK single mattress size used throughout Northern Ireland.
Buying Checklist for Northern Ireland and Cross-Border Shoppers
- Measure your existing bed frame or floor space in centimetres, not just feet.
- Decide which country the supplier is based in and request the exact mattress dimensions.
- Check whether the product uses UK 135x190cm or EU 140x200cm for doubles.
- Confirm any children’s bed meets BS EN 747 for bunks or UK fire regulations for mattresses.
- Allow 5–10cm clearance around the bed for bedding and movement.
- When in doubt, choose king size (150x200cm) as it is standardised across both markets.
Following this list prevents the common error of ordering a 10cm-longer EU mattress for a UK base. For larger rooms consider king size beds or super king size beds where the dimensions align perfectly.
Mattress Compatibility and Fire Safety
UK mattresses must comply with the Furniture and Furnishings (Fire) (Safety) Regulations 1988 and are tested to BS 7177. Irish suppliers selling into Northern Ireland follow the same standard. A mattress labelled only for the Republic may use different foam densities or fire barriers. The Maxitex Premier Sprung Mattress - Double Continental is built to UK specifications yet fits the slightly wider continental double frame if you choose that variant. Always verify the compliance label on the mattress.
Practical Advice for Ottoman and Storage Beds
Storage beds and ottoman designs add depth, so check the stated maximum mattress depth on the product page. A king size ottoman bed such as those in the king size ottoman beds range uses the standard 150x200cm UK size found on both sides of the Irish Sea. This avoids the mismatch risk that arises with double sizes. Pair with a king size mattress from brands such as Solace+Co, Maxitex or Noomi for guaranteed compatibility.
Shoppers in Northern Ireland benefit from the fact that the majority of retailers stock UK sizes. When buying from Republic of Ireland sources, request written confirmation of the exact centimetre measurements before purchase. This single decision rule eliminates most sizing problems.
Our picks for this guide
- Flair Montana Captain's Guest Bed – Works on standard UK single size and offers flexible guest space without size mismatch risk.
- Recoil Shuttle Gaming Bunk Bed Black & Red – Meets BS EN 747 and is built for the UK single mattress size used throughout Northern Ireland.
- Maxitex Premier Sprung Mattress - Double Continental – Fits the exact 90x190cm single size common to both UK and Irish markets, ideal for children’s rooms in Northern Ireland.
- Flair Ava Boucle Single Bed Pink – Fits the exact 90x190cm single size common to both UK and Irish markets, ideal for children’s rooms in Northern Ireland.
Frequently asked questions
Will a UK double mattress fit an Irish double bed?
A standard UK double mattress (135x190cm) will not fit an Irish or EU double bed frame sized 140x200cm. The 5cm width and 10cm length difference means it will be too small. Always match the exact dimensions rather than the name.
Are super king beds the same in UK and Ireland?
Yes, the super king size of 180x200cm is identical in both markets. This makes super king beds and mattresses a safe choice for cross-border purchases. Check only that the bed frame states the maximum mattress depth allowed.
What size is a standard single bed in Northern Ireland?
Northern Ireland follows the UK single size of 90x190cm. This is the most common size for children’s and adult single beds. EU single (90x200cm) is 10cm longer and will overhang a UK single base. Measure carefully if buying from a Republic of Ireland supplier.
Do bunk beds have different regulations in Ireland?
Bunk beds sold in the UK, including Northern Ireland, must meet BS EN 747 with the top guard rail at least 16cm above the mattress. Top bunks are not recommended for children under 6. Irish regulations are aligned; always confirm the maker’s maximum mattress depth.
Should I buy a mattress in cm or ft when shopping across the border?
Always use centimetre measurements. Feet labels can be rounded and misleading. Compare the exact cm figures (for example 135x190cm UK double versus 140x200cm EU) and check against your bed frame before ordering.