How Big Is A King Duvet Cover? Size Chart And Fit Guide

How big is a king duvet cover? Size chart and fit guide

How big is a king duvet cover? At California Design Den, a king duvet cover measures 106 inches wide by 90 inches long, and an oversized king duvet cover measures 120 inches wide by 98 inches long. Both sizes are cut to hold a king insert or comforter. The insert is not included, so measure the one you own and choose the cover closest to it.

If you are asking how big is a king duvet cover because a new insert is on the way, start with width. The king size of the Everyday Ease 400 Sateen Cotton Duvet Cover in green sage gives you 106 inches across. The full/queen cover is 92 inches wide, and both share the same 90-inch length.

California Design Den offers its duvet covers in four sizes, and every figure in this guide is a finished cover measurement. Below you will find a quick answer, a chart of all duvet cover sizes, a side-by-side look at king and oversized king, simple steps for measuring your insert, and a short FAQ.

Quick answer: how big is a king duvet cover

A king duvet cover is 106 x 90 inches. An oversized king duvet cover is 120 x 98 inches. Pick the size that matches your insert, not just the name on the label.

Width is the number that separates the two king sizes most clearly. Length matters too: the oversized king cover is 98 inches long, and the king is 90 inches long.

King duvet cover size at a glance

The king cover is the one to start with if your insert is labeled king and measures close to the cover.

• King duvet cover: 106 inches wide x 90 inches long.
• King duvet cover set: the cover plus 2 king pillow shams, each 21 x 37 inches with a 6-inch hem.
• Insert or comforter: not included with any California Design Den duvet cover.

Oversized king duvet cover size at a glance

The oversized king cover gives you more fabric in both directions, so it suits a wider, longer or fuller insert.

• Oversized king duvet cover: 120 inches wide x 98 inches long.
• Oversized king duvet cover set: the cover plus 2 king pillow shams, each 21 x 37 inches with a 6-inch hem.
• Striped and printed duvet covers use the same dimensions and are made in twin/twin XL, full/queen and king.

Duvet cover sizes chart

Here is every size side by side, so you can see where the king sits in the range. All figures are width x length, in inches.

Insert not included with any size. Measure your insert or comforter before you order.

King duvet cover dimensions explained

A king duvet cover has two numbers: 106 inches across and 90 inches from head to foot. Each number does a different job, so it helps to look at them one at a time.

Width decides how far the cover reaches across the bed. Length decides whether the cover reaches the foot of the bed once the top edge is folded back at the pillows.

How wide is a king size duvet cover

A king size duvet cover is 106 inches wide. That width is sized to hold a king insert with the fill spread evenly from edge to edge.

Here are the widths of the other sizes in the range:

• Full/queen duvet cover: 92 inches wide.
• Twin/twin XL duvet cover: 68 inches wide.
• Oversized king duvet cover: 120 inches wide.

How long is a king size duvet cover

A king size duvet cover is 90 inches long. That is the same length as the full/queen cover, so the difference between those two sizes is all in the width.

The oversized king cover adds length as well as width, at 98 inches long. If your insert runs longer than 90 inches, that extra length matters as much as the extra width.

The twin/twin XL cover, at 92 inches, is slightly longer than the king but far narrower, so the two sizes are never interchangeable.

King pillow sham size in a duvet cover set

A king duvet cover set adds 2 king pillow shams. Each sham measures 21 x 37 inches and finishes with a 6-inch hem around the edge.

The oversized king set uses the same king shams. If you move from king to oversized king later, the shams you already own still match the new set.

The full/queen set uses 2 shams of 21 x 27 inches, and the twin/twin XL set uses 1 sham of the same size. Check which shams you already own before you choose a cover only or a full set.

If you are wondering whether you need an insert at all, our guide Can You Use a Duvet Cover Without an Insert? covers that question in full.

King vs oversized king duvet cover: choosing the right size

Choose the king duvet cover if your insert measures close to 106 x 90 inches. Choose the oversized king duvet cover if your insert is wider or longer than that, or if you like more fabric falling over the sides.

Neither size is a step up from the other. The two covers are cut for different inserts and different looks, and the table below sets them out feature by feature.

When a king duvet cover is the right fit

The king cover suits you when your insert and the cover line up closely. A close match gives a smooth, filled look with little loose fabric.

• Your insert or comforter measures close to 106 x 90 inches.
• You want a tailored look, with the cover ending neatly at the sides of the bed.
• You want a striped or printed design, since those run from twin/twin XL up to king.

If pattern is part of the plan, browse our Striped Duvet Covers for king-size options in stripes.

When an oversized king duvet cover is the right fit

The oversized king cover suits you when your insert needs more room, or when you want the cover to fall lower over the sides.

• Your insert measures wider than 106 inches or longer than 90 inches.
• Your insert is thick and lofty, and needs extra room to fill out.
• You like a fuller drape, with more fabric reaching down the sides of the bed.

A lofty insert takes up some of the cover's width as it fills out. That is why a full, puffy king insert can look tight in a cover that matches its flat measurements, and roomier in the oversized king.

How to measure for the right king duvet cover size

Measure your insert, not your bed, and then compare those numbers with the cover. A good match is a cover that is the same size as the insert or very close to it.

All you need for the steps below is a tape measure. Write the numbers down so you can check them against the chart before you order.

Step 1: Measure your insert or comforter

Lay the insert flat on the floor or across the bed. Smooth out the fill so you are not measuring over a fold or a lump.

• Measure edge to edge across the width.
• Measure from the top edge to the bottom edge for the length.
• Round to the nearest inch and note both numbers.

Comforter and insert sizes are not the same from one brand to the next. A label that says king is a starting point, not a measurement.

Step 2: Compare your numbers with the cover

Line up your insert measurements against the king and oversized king figures.

• Insert close to 106 x 90 inches: choose the king duvet cover.
• Insert close to 120 x 98 inches: choose the oversized king duvet cover.
• Insert between the two: choose the cover that is the same size or slightly larger, never smaller.

A cover smaller than the insert compresses the fill and is hard to close. A cover far larger than the insert leaves empty fabric at the edges, which can twist inside the cover.

Step 3: Check whether you have an insert or a comforter

Both can go inside a duvet cover, but they behave a little differently. A duvet insert is made to sit inside a cover, while a comforter is finished to be used on its own.

Not sure which one you have? Our Duvet vs Comforter guide explains how the two differ, which helps when you size the cover.

Step 4: Check the fit when the cover arrives

Before you put the insert in, lay the new cover flat and spread the insert on top of it. The corners of the insert should sit at or just inside the corners of the cover.

• If the insert corners reach past the cover corners, the cover is too small for that insert.
• If there is a wide strip of empty cover on every side, the insert is smaller than the cover.
• If the edges line up closely on all four sides, you have a close match.

Checking the fit this way shows you whether the size works for your insert before it goes on the bed.

Sizing mistakes to avoid

A few simple checks prevent a cover that does not fit.

• Buying by the label alone. Measure the insert, since sizes vary by brand.
• Choosing a cover smaller than the insert. The fill bunches and the opening strains.
• Forgetting the shams. Decide whether you want cover only or a set before you order.
• Ignoring loft. A very full insert may need the extra room of the oversized king.

California Design Den king duvet cover: Everyday Ease 400 Sateen Cotton Duvet Cover

The Everyday Ease 400 Sateen Cotton Duvet Cover is our 400 thread count duvet cover, made in king and oversized king along with the smaller sizes. Here is what it feels like, what it is made from and what comes with it.

Feel and look of the Everyday Ease 400 Sateen Cotton Duvet Cover

The Everyday Ease 400 Sateen Cotton Duvet Cover is soft, smooth cotton sateen with a subtle sheen and minimal wrinkles on the bed.

The fabric is soft and breathable cotton sateen for everyday comfort. The surface feels smooth to the hand, and the gentle sheen gives the bed a finished look without extra styling.

For a calm, earthy look, the Everyday Ease 400 Sateen Cotton Duvet Cover in green sage pairs well with white, cream or soft gray sheets.

Fabric: 100% long-staple cotton, sateen weave

The cover is 100% long-staple cotton, sateen weave. Long-staple cotton spins into smoother, stronger yarn than shorter cotton fibers.

A sateen weave uses a four-over-one-under float. That structure puts more yarn on the surface, which is where the smooth feel, the drape and the sheen come from.

100% natural cotton — no petroleum-based synthetic fibers, no polyester, no microfiber.

Testing and trust

Two trust marks apply to this cover.

• Tested for harmful substances to OEKO-TEX STANDARD 100.
• The Everyday Ease 400 Sateen Cotton Duvet Cover is backed by the Good Housekeeping Seal.

What comes with a king duvet cover from California Design Den

Each king listing tells you exactly what is in the package.

• Duvet cover only: the king cover, 106 x 90 inches.
• Duvet cover set: the king cover plus 2 king pillow shams, 21 x 37 inches each.
• Insert not included: bring your own insert or comforter.

Prefer a warm neutral? The Everyday Ease 400 Sateen Cotton Duvet Cover in beige sits easily with wood furniture, linen textures and white sheets.

California Design Den is a family-owned cotton bedding brand. No middlemen. No markup.

How to choose a king size duvet cover: buying guide

Start with size, then decide between cover only or a set, then choose color and care. Each step narrows the options until one cover fits both your insert and your room.

Match the cover size to your insert

Use the measurements you took earlier. An insert close to 106 x 90 inches points to the king cover, and a wider or longer insert points to the oversized king.

Among duvet cover sizes, these two are the only ones built for a king insert. The full/queen cover is 92 inches wide, so it is not a substitute.

Write your insert's width and length next to the two king figures before you shop. Seeing both sets of numbers side by side makes the choice clear.

If you plan to use the cover on its own on some nights, read Can You Use a Duvet Cover Without an Insert? before you decide on size.

Choose cover only or a duvet cover set

A cover-only listing suits you if you already own king shams or like mixing textures on the bed. A duvet cover set adds 2 king pillow shams in the same fabric for a matched look.

The Everyday Ease 400 Sateen Cotton Duvet Cover in beige is a cover-only option, so you can keep the shams you already have and change just the cover.

Choose a color or pattern

Solid colors keep the bed calm and easy to layer with throws and pillows. Stripes add structure and work well in rooms with simple furniture.

A king cover is a large block of color, so it sets the tone for the whole room.  

Our Striped Duvet Covers come in twin/twin XL, full/queen and king, so stripes are an option for a king insert.

If you are refreshing the whole bed at once, King Bedding Sets brings king pieces together in one place.

Think about the season

Warmth comes from the insert you choose. You can keep the same king cover all year and swap a lighter or heavier insert as the seasons change.

That makes the cover size even more important. If you own two king inserts, measure both and choose the cover that suits the larger one.

Care for your king duvet cover

For the Everyday Ease 400 Sateen Cotton Duvet Cover: machine wash warm, tumble dry low, do not bleach.

• Take the insert out before washing.
• Give the cover enough room in the washer to move freely.
• Put the insert back once the cover is fully dry.

Frequently asked questions about how big is a king duvet cover

Is an oversized king duvet cover bigger than a king?

Yes. The oversized king duvet cover is 120 x 98 inches and the king duvet cover is 106 x 90 inches, so it is wider and longer.

How big should a king size duvet cover be?

A king size duvet cover should match your insert. Our king duvet cover is 106 x 90 inches and our oversized king is 120 x 98 inches, so measure your insert and choose the closer fit.

How much bigger is a king duvet than a queen?

A king duvet cover is 106 x 90 inches and a full/queen cover is 92 x 90 inches. The king duvet cover is wider, and both share the same 90-inch length.

Should I buy a king size duvet cover or a queen size duvet cover?

Buy the size that matches your insert. A king insert needs the 106 x 90-inch king duvet cover, and a queen insert fits the 92 x 90-inch full/queen cover. Measure the insert first.

Can I put a king duvet in a queen cover?

Not for a neat fit. The full/queen cover is 92 inches wide and the king duvet cover is 106 inches wide, so a king insert bunches inside it. Choose a king or oversized king cover.

Final verdict on king duvet cover size

How big is a king duvet cover? At California Design Den, a king duvet cover is 106 x 90 inches, and an oversized king duvet cover is 120 x 98 inches for wider or longer inserts.

The right choice comes down to your insert. Measure it, compare it with the chart, and choose the cover that matches it most closely.

Key takeaways on king duvet cover size

• King duvet cover: 106 x 90 inches. Oversized king: 120 x 98 inches.
• Measure your insert before you choose, since insert sizes vary by brand.
• King and oversized king sets add 2 king shams, 21 x 37 inches each.
• The insert is not included with any of our duvet cover sizes.

Next steps for your king bed

Still deciding what goes inside the cover? Read Duvet vs Comforter before you order, so the insert and the cover match.

When the size is settled, browse King Bedding Sets to finish the bed in matching king pieces.