Super King – UK vs US: What’s the Difference?
When it comes to bed sizes, “Super King” doesn’t mean the same thing on both sides of the Atlantic. While it’s a common and standardized size in the UK, the term is rare and inconsistently used in the US, where King and California King dominate.
See our UK Super King Guide, or dive into a full breakdown of the differences between UK and US Super King Beds:
| Feature | UK Super King | US “Super King” (Unofficial) |
|---|---|---|
| Dimensions | 72″ × 78″ (183 cm × 198 cm) | Not standardized; often used for oversized custom beds, typically larger than 76″ × 80″ |
| Availability | Widely available and standardized | Rare and non-standard, usually custom-made |
| Common Use | Standard size in UK master bedrooms | Luxury homes, custom setups, or marketing term |
| Alternative Names | European King, 180 cm bed | Oversized King, Deluxe King, Custom King |
🧭 Key Differences Explained
🇬🇧 UK Super King
- Standard Size: 72″ × 78″ (183 cm × 198 cm)
- Largest standard bed size in the UK
- Fits two Twin XL mattresses side-by-side
- Widely supported with frames, mattresses, and bedding in UK/EU markets
🇺🇸 US “Super King”
- Not an official size under US mattress standards
- Some retailers use “Super King” as a marketing term for:
- Wyoming King (84″ × 84″)
- Alaskan King (108″ × 108″)
- Custom King sizes larger than 76″ × 80″
- Requires custom bedding and frames
- Mostly seen in luxury markets or high-end interiors
🛌 Conclusion
The UK Super King is a standard, widely used size measuring 72″ × 78″, perfect for couples wanting more space. In contrast, “Super King” in the US is not a defined standard—usually referring to oversized, custom, or boutique beds that vary greatly in size.
✅ Tip for international shoppers: Always check exact dimensions before buying bedding or mattresses across regions—“Super King” means something very different depending on where you are!