The Duvet Size Guide: How to Choose a Duvet for the Perfect Night’s Sleep

A good night’s sleep starts with your choice of bedding, so it’s important to invest in a high-quality duvet that caters to your sleep style.

However, with so many duvets available, choosing the right one for you can be a daunting experience.

Should you opt for a natural or synthetic-filled duvet, and does the tog rating matter? Moreover, what size should your duvet be?

At The Fine Cotton Company, we’ve spent years working with the best suppliers to curate luxury filled bedding to offer the perfect night’s sleep, so you don’t need to be an expert. From what tog duvet to buy to the best size duvet for your bed, read on for all you need to know before investing in luxury. 

Table of Contents

  1. Things to consider when choosing your duvet
  2. The different types of duvet fillings
  3. What size should my duvet be?
  4. Should you size up your duvet
  5. Should the duvet insert be larger than the cover?
  6. Shop luxurious hotel duvets at The Fine Cotton Company

Things to consider when choosing your duvet

When shopping for a new duvet, alongside size, there are two main factors to consider: Tog rating and filling. Which tog duvet and filling you select can significantly impact your quality of sleep, so it’s important to research your options before investing. 

Below, we’ve covered the ins and outs of tog rating and filling to help you choose the right duvet for you.

Tog Rating 

Every duvet has a tog rating, which indicates how much warmth the duvet will provide. The tog rating is measured by how much air the duvet can wrap around you as you sleep, and as such higher tog duvets will provide more warmth. 

To achieve the perfect night’s sleep, it’s important to opt for a duvet that will keep you warm enough to sleep soundly but not so warm that you are uncomfortable. With this in mind, most people choose to switch up their duvets twice a year – selecting both a summer and a winter duvet option. This not only means that you will experience a better night’s sleep with a climate-appropriate duvet, but you will also extend the life of your duvet by resting it.

At The Fine Cotton Company, we stock everything from 4.5 tog duvets ideal for warm summer nights to hefty 13.5 tog duvets that will provide additional warmth and insulation during the cold winter months. 

Alternatively, many people choose to opt for a middle-range 10 tog duvet which works well all year round. And if you’re looking for extra warmth, you can add extra layers to your duvet as you need them. Our luxurious cotton blankets and throws are great for this purpose and can also be used to create a beautiful focal point in your bedroom. 


The Filling 

The duvet filling you choose can significantly influence the quality of your sleep, so it pays to do your research. 

There are two types of fillings to choose from: Natural and synthetic. 

Naturally filled duvets, such as feather and goose down duvets, are soft to the touch and breathable. They are generally lighter in weight than synthetic-filled duvets, so they can give the illusion of being less warm. However, natural fillings such as feather and goose down have efficient thermal properties, making them superior to artificial fillings.

When shopping for duvets, you will find an abundance of styles, ranging from duvets that cost as little as £20 to £200. However, when it comes to your duvet, it pays to invest in more luxurious products.

Have you ever noticed that your duvet can become thin at one end, as though all of the filling has reached the bottom? You might find that you need to routinely shake your duvet to distribute the filling back to its rightful place.

Cheaper duvets tend to lose their filling during the night. However, the box cassette construction of all our duvets at The Fine Cotton Company means the filling stays put, keeping you warm, snug and comfortable all night long.

The different types of duvet fillings

Each duvet filling has different components worth considering before parting with your money. 

As a general rule of thumb, if you suffer from allergies, you should opt for a synthetic-filled duvet. However, below we’ve covered the most popular fillings to consider when shopping for a new duvet.

Goose down

Goose down feathers are supremely soft and make excellent insulators. With no quill, they make incredibly luxurious and sumptuous duvets that are lightweight and perfect for year-round use.

If you prefer a reassuringly thick and soft duvet that sinks around you as you sleep, a goose down filling is an opulent choice.



Renowned for its luxuriousness, silk is a breathable option that stays warm in winter and cool in summer, making it an excellent year-round choice. If cared for properly, silk duvets can last up to 15 years, making them a truly valuable addition to your home.

Our luxurious silk duvets at The Fine Cotton Company are 100% natural and hypoallergenic, making them an ideal choice for allergy sufferers. When paired with our sateen cotton pillowcases, they truly inject hotel luxury into your nighttime routine.


Pure wool duvets naturally regulate your body temperature, instantly improving your sleep quality. Stitched with unique designs for an elegant finish, the wool filling eliminates any cold spots and is more porous than synthetic fillings. They are full and fluffy, allowing for a truly luxurious sleep. 


Vegan down

New on the duvet block are vegan and recycled fillings. Boasting the luxuriousness of natural down without any animal components, vegan down is an ethically conscious duvet filling that does not disappoint. 

Our selection of vegan down duvets at The Fine Cotton Company offers a premium alternative to our natural down fillings. Their silky-soft fibres replicate the feeling of natural filling and will keep you warm and ultra-comfortable throughout the entire night.

What size should my duvet be?

Choosing the right size duvet for your bed can be more complicated than you think.

Aim to purchase a wider and longer duvet than your mattress. A double-sized duvet will offer a perfect fit if you have a double-sized bed. 

If you choose a duvet that is too short, you run the risk of waking up with cold feet during the night, which will disrupt your sleep and leave you waking up less than refreshed. 

Purchasing a duvet that matches your mattress ensures that you will be completely covered and warm throughout the night, allowing for a truly comfortable night’s sleep.

Should you size up your duvet? 

Most people opt for a duvet that matches the size of their mattress; however, if you prefer extra coverage or you share a bed with a partner, you might prefer a larger duvet. 

Sizing up your duvet, for instance, opting for a king-sized duvet to cover a double bed, ensures plenty of cover for everyone. This also means that there’s no risk of waking up in the middle of the night because you’ve been left out in the cold, so you can guarantee that you’ll get a good night’s sleep. 

Should the duvet insert be larger than the cover?

Duvet covers are always made to fit the corresponding duvet size, so you don’t need to size up your duvet cover. 

If your duvet cover is too big for your duvet, you might wake up throughout the night to find that your duvet has fallen to the bottom of your cover, which can result in disrupted sleep and chilly limbs!

At The Fine Cotton Company, our luxurious duvet covers are expertly crafted to fit your duvets perfectly. They are secure without being too snug, meaning that your duvet won’t move throughout the night. 

Shop luxurious hotel duvets at The Fine Cotton Company

Your choice of duvet can be the difference between an exceptional and average night’s sleep, so it’s important to purchase a duvet that caters to your unique sleeping style. 

From what size duvet to choose to tog ratings and fillings, there are multiple factors to consider when shopping for a new duvet, and it’s important to wade through the research to ensure that you make the best choice for you.

Today’s market is bursting with choice. However, investing in higher quality bed linens will ensure that your investment is durable, long-lasting, and maintain its luxurious touch for many years.

Our beautiful selection of opulent duvets at The Fine Cotton Company has something for everyone, no matter the season. You will find truly stunning designs expertly woven with premium fabrics to ensure that you experience the perfect night’s sleep every night.

Of course, luxury comes down to the finer details, so if you’re looking to inject hotel luxe into your nighttime regime, why not shop our deluxe personalised collections? From super-soft gowns to luxurious slippers, we offer everything you need to add the perfect finishing touches to your nighttime regime.