# Hybrid Extra Firm Kingsize Mattress, Support for Back, 25cm

Source: https://www.ranked10.co.uk/home/best-mattress-for-side-sleepers/extra-firm-style
Ranked #6 in "Best Mattress for Side Sleepers 2026: Two Say Extra Firm": https://www.ranked10.co.uk/home/best-mattress-for-side-sleepers

- Price: £153.42 (checked on Amazon UK on 2026-09-13)
- Amazon rating: 4.3 from 418 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B0G7XDCC8F?tag=ranked10-21

The extra firm kingsize mattress costs £153.42 and is rated 4.3 stars from 418 ratings, with a twenty-five centimetre depth and a hybrid construction.

It takes sixth because it is the only mattress in this article that says extra firm — in the title and again in its style field, where other listings put a colour — while giving no spring count or foam density to explain the word.

## Specification

| Field | Value |
|---|---|
| Firmness | Extra firm, in the title and the style field |
| Style field | "Hybrid Extra Firm-25CM" |
| Depth | 25 centimetres, units consistent |
| Evidence | 418 ratings at 4.3 stars |
| Construction | Memory foam hybrid |
| Price | £153.42 |

## Questions people ask

**Is it really extra firm?**

That is what the listing says, twice, without a scale.

**What makes it firm?**

The page does not say: no spring count and no foam density.

**What size is it?**

A 5ft king: 150 by 200 centimetres.

**How is it rated?**

4.3 stars from 418 buyers.

**Why is it sixth?**

Because it uses the right word and does not explain it.

**How many ratings does it have?**

418 at the time of collection, averaging 4.3 stars, with 73 per cent five-star and 9 per cent one-star.