UK pillow protectors and pillowcases share the same standard size: 50 × 75cm (20 × 30 inches), fitting all standard UK pillows. The protector zips or envelopes over the bare pillow first; the pillowcase goes over the top. Square/Euro cases are 65 × 65cm and Super King cases 90 × 50cm.
| Item | Size (cm) | Size (inches) | Fits |
|---|---|---|---|
| Standard pillowcase / protector | 50 × 75 | 20" × 30" | All standard UK pillows |
| Super King pillowcase | 90 × 50 | 35" × 20" | Super King pillows |
| Square / Euro case | 65 × 65 | 26" × 26" | Square continental pillows |
The protector takes the sweat, oils and allergens so the pillow itself stays cleaner for longer.
Pillows absorb moisture and skin oils nightly and are hard to wash properly; a quilted protector is machine-washable, adds a comfort layer, and meaningfully extends pillow life. For allergy-prone households, wash protectors at 60°C — the temperature needed to kill dust mites (per NHS/Allergy UK guidance — see the Allergy UK website).
Yes — all standard UK pillows are 50 × 75cm, so one protector size fits them.
Monthly at 60°C for allergy protection; the pillowcase weekly.
They add a thin cushioned layer — most people find it slightly softer; it doesn’t affect firmness.
No — it prevents future flattening from moisture but can’t restore lost loft; replace the pillow instead.
The protector is a washable barrier layer worn under the case; the case is the outer cover you sleep on.
Written by the Posh Tag team. Published 13 July 2026. Last updated 13 July 2026.
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