UK Double vs JP Semi-Double
Detailed size comparison between UK Double and JP Semi-Double. See the dimensions side-by-side to ensure you buy the right mattress.
Visual Size Comparison
UK Double
JP Semi-Double
UK Double
135 x 190 cm
Area: 2.56 m²
JP Semi-Double
120 x 195 cm
Area: 2.34 m²
The Verdict
The UK Double is roughly 10% larger than the JP Semi-Double.
⚠️ Warning: Fitted sheets designed for the Semi-Double likely won't fit the Double accurately.
Why comparing mattress sizes matters
International sizing standards vary significantly. A "King" in the US is not the same as a "King" in the UK or Australia. Mistaking these can lead to purchasing bedding that doesn't fit or rugs that look awkward in your space.
Quick Rule of Thumb:
US sizes tend to be wider and longer than their UK/EU counterparts. Always check the CM measurements before buying fitted sheets or frames.
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