King Quilt Cover Size Guide: Sizing, Hotel Duvets & Tog

Five dimension groups, one pattern: the label “king” is not a global standard. A UK king cover (230 x 220 cm) differs from an IKEA king (240 x 220 cm) and a European king (260 x 240 cm). The implication: always check the retailer’s specific size chart, not just the size name.

What is a king size quilt cover?

A king size quilt cover is a protective fabric casing designed to hold a duvet for a bed that is 150 cm wide — the standard UK/Ireland king mattress width. According to Morgan and Reid (UK bedding specialist), the typical cover dimensions are 230 x 220 cm for the UK and Irish market. Your cover must match your duvet insert size; a 230 x 220 cover requires a 230 x 220 duvet, not a smaller or larger one.

Standard king duvet cover dimensions in UK and Ireland

The most common king duvet cover dimensions in Ireland and the UK are 230 cm wide by 220 cm long. Dunnes Stores product listings confirm this sizing across their own-brand and branded collections. For a 150 cm x 200 cm king mattress, that cover provides roughly 40 cm of overhang on each side and 10 cm of drop at the foot — a balanced proportion that prevents the duvet from dragging on the floor while still covering the mattress edges.

Difference between king and super king sizes

A super king cover jumps to 260 x 240 cm, designed for a 180 cm x 200 cm mattress. Frette’s luxury bedding size chart treats super king as the standard for wider European beds. If you have a standard king mattress (150 cm wide), a super king cover will pool heavily on the sides and may drag on the floor — not recommended unless you have a deep mattress with significant toppers.

Is 240×220 king size?

Yes, 240 x 220 cm is sold as king size by several European retailers, but it is not the standard UK/Ireland king. The confusion arises because different markets assign different dimensions to the same label.

Dimensions explained: 240 x 220 compared to standard king 230 x 220

Magniberg’s size guide lists king covers as 240 x 220 cm, while the standard UK/Ireland king is 230 x 220 cm. That extra 10 cm in width means a 240 x 220 cover will fit a 150 cm wide mattress with about 45 cm of overhang per side — slightly more generous than the usual 40 cm. Foxford’s bedding size guide notes that a 230 x 220 cover already provides adequate coverage, so the 240 x 220 option is for those who prefer a fuller drape or have a deeper mattress.

Retailer variations in king sizing

Different retailers use different king dimensions. IKEA Ireland sells king duvet covers in 240 x 220 cm, while JYSK and Dunnes Stores typically list the standard 230 x 220 cm. Sheets Society (Australian bedding retailer) lists king as 210 x 245 cm for the Australian market. The catch: if you buy a cover from one retailer and a duvet from another without checking, you may end up with a mismatch.

The implication: always compare the actual centimetres, not just the size name.

What kind of duvets do 5 star hotels use?

Five-star hotels invest in duvets that last years and maintain consistent loft. Their choices reveal a lot about what makes a quality duvet, and Irish shoppers can learn from their standards.

Fill types: goose down vs feather vs synthetic

Most five-star hotels use high-quality goose down duvets with a fill power ranging from 550 to 700. According to Frette’s bedding guide (luxury hotel supplier), baffle-box construction — internal fabric walls that keep the down from shifting — is a hallmark of hotel-grade bedding. Goose down provides superior warmth-to-weight ratio and compressibility compared to feather or synthetic fills. Duck feather duvets, while cheaper, are heavier and less lofty. Synthetic fills lack the breathability of natural down, making them less suitable for the year-round comfort hotels need.

Tog ranges for hotel comfort

Hotels typically avoid extreme tog ratings. They opt for medium togs — usually 9.0 or 10.5 — to suit a wide range of guests across seasons. JYSK Ireland product range includes 10.5 tog duvets that align with this hotel preference. The reasoning: a 13.5 tog duvet, while warmer, is too heavy and hot for many guests, and hotels want one duvet that works for most people most of the year. For Irish homes, that means a 10.5 tog with a separate lightweight summer duvet gives you the flexibility hotels enjoy.

Can you put a queen size quilt in a king size quilt cover?

The short answer is yes, you can physically fit a queen duvet (210 x 210 cm) inside a king cover (230 x 220 cm), but the result is rarely comfortable.

Problems with using a smaller duvet in a larger cover

When you put a 210 x 210 duvet into a 230 x 220 cover, the duvet has 10 cm of extra width and 10 cm of extra length to shift around. LinenMe’s size chart warns that the duvet will bunch, move to one side, and leave cold spots where the cover is empty. Overnight, the empty fabric can twist and tangle, turning a restful sleep into a wrestling match with your bedding.

Visual and comfort issues

Beyond the poor sleep experience, a queen duvet in a king cover looks wrong. The cover will appear deflated and uneven, with sagging areas where there’s no fill. For guest bedrooms or master suites where appearance matters, this mismatch is not acceptable. The pattern is clear: always match the duvet size to the cover size. A queen duvet belongs in a queen cover (210 x 210 cm), and a king duvet belongs in a king cover (230 x 220 cm or 240 x 220 cm depending on your retailer).

The catch: mismatched sizes lead to cold spots and constant readjustment, making the “savings” of not buying a new duvet feel like a nightly penalty.

Is 10.5 or 13.5 tog better for winter?

The answer depends entirely on your bedroom’s temperature and your personal sleep habits. Tog ratings measure thermal insulation, not warmth — a 13.5 tog duvet traps more heat than a 10.5 tog one.

Tog rating guide: 10.5 vs 13.5 for cold bedrooms

For unheated Irish bedrooms that drop to 10–12°C on winter nights, a 13.5 tog duvet is the right choice. JYSK Ireland stocks 13.5 tog options specifically for this market. If your bedroom is centrally heated or you sleep warm, a 10.5 tog duvet provides enough warmth without overheating. The difference: 13.5 tog traps roughly 28% more heat than 10.5 tog, based on standard tog-to-temperature mapping (each tog point adds about 2°C of effective warmth).

Factors: room temperature, personal preference

Many Irish households use a layered system: a 10.5 tog duvet year-round with an additional lightweight throw or summer duvet for extra warmth when needed. This approach gives you flexibility across Ireland’s temperate but variable climate. Sienna Living’s bedding guide reinforces that measuring your bed depth including toppers matters for both fit and comfort; a deeper mattress changes how the duvet drapes and can affect perceived warmth.

The pattern: a 10.5 tog suits heated bedrooms, while 13.5 tog is ideal for unheated rooms. Many Irish households use a 13.5 tog from November to March.

“Always measure your mattress depth including any toppers and protectors before buying a quilt or duvet cover — a mismatch here is the most common cause of poor fit.”

— JYSK bedding section description

“King duvet cover sizes available online from Dunnes Stores include 230 x 220 cm, consistent with UK standard sizing.”

— Dunnes Stores product page

The consequence is clear: for Irish shoppers, the king quilt cover decision comes down to three numbers — your mattress width plus depth, your duvet’s tog rating, and your retailer’s specific centimetres. For the standard 150 x 200 cm king bed in Ireland, a 230 x 220 cm cover with a 10.5 or 13.5 tog goose down duvet (550 fill power or higher) delivers the hotel-like comfort most people are after. The trade-off: spending a bit more upfront on a quality duvet and cover saves years of fiddling with bunching, cold spots, and mismatched sizes. For the Irish shopper, the choice is clear: measure your bed, check the centimetres, and buy a matching set — or face a winter of readjusting your bedding every single night.

Related reading: King quilt cover size guide Ireland

For a detailed comparison of UK vs EU duvet cover sizes, see the guide that breaks down the differences between the two standards.

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