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Bedding guide

10cm Extra Thick Mattress Topper 1100GSM Deep Fill: what 1100GSM actually means

23 July 2026

The 10cm Extra Thick Mattress Topper 1100GSM Deep Fill is one of the mattress toppers we stock at Daffodil Collections. It sits in our Microfibre Toppers range, and this is the short version of what you need to know before you choose a size.

How to choose

A topper changes the surface of a bed, not its support. If the mattress underneath has gone soft in the middle, a topper will follow that dip rather than fill it — what a topper fixes is a mattress that is too firm, or a surface that has stopped feeling comfortable.

Depth is the decision. A few centimetres softens a mattress that is close to right; a deeper one is a bigger change and needs a deeper fitted sheet over the top of it. Measure the mattress, add the topper, and buy the sheet to that number.

The sizes it comes in

UK bed names are consistent between retailers; what is not consistent is the mattress underneath them, so measure yours before ordering. These are the sizes this one is made in, with the mattress each is cut for.

SizeThe mattress it fits
Single90 x 190 cm (3ft x 6ft 3in)
Small Double (4ft)120 x 190 cm (4ft x 6ft 3in)
Double135 x 190 cm (4ft 6in x 6ft 3in)
King150 x 200 cm (5ft x 6ft 6in)
Super King180 x 200 cm (6ft x 6ft 6in)

If your bed falls between two of these, size up: a fitted sheet that is slightly generous tucks, and one that is slightly tight pulls its corners off in the night.

Colours and pack sizes

There is one colourway: Microfibre. Colour is the one decision here that is purely yours — but if this is going into a room that is let or shared, the darker shades hide a coffee ring and the palest ones photograph best.

What the numbers mean

1100GSM is grams per square metre — the weight of the fabric itself, and the single most useful number on a towel. Below about 400GSM a towel is light and dries quickly; 500 to 600 is the everyday weight most people mean by a good towel; above 600 is the heavy hotel feel that takes longer to dry. At 1100GSM, this one sits in the heavy, hotel-weight end of that range.

10cm is the depth of the item itself. On a topper that is the number that decides how much it changes the bed: a few centimetres soften a mattress that is close to right, where a deeper one is what you reach for when the mattress underneath has gone hard.

For hotels, B&Bs and holiday lets

Bedsheets for hotels and B&Bs are washed at a temperature and a frequency no household matches, so the things that matter are the seams, the elastic and how the colour holds. That is why the hospitality trade buys in quantity and in one colour: a matched stock of quality hotel beddings is what makes a linen cupboard workable.

If you are buying for a business, our trade account is where the wholesale beddings pricing lives — the terms are on that page and they are read from the account, not from this article.

Where it sits in the range

The current price is on the product page below, and it is the price you pay — we are not VAT registered, so nothing is added at the checkout.

Looking for something else in the same line? The journal index has our guides to mattress toppers, and the product page carries the full specification, the stock position and the delivery estimate for your postcode.

In this guide

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