What size wool comforter do you need for a king or queen bed?

Updated October 7, 2026.

A wool comforter sold as "king" does not come in one fixed size. The US product pages we read for this guide listed kings at several different widths, and three of the eight did not plainly say how much wool was inside. Those two gaps decide whether the mattress edge shows and how warm the bed feels. This page shows you how to check width, side drop and fill weight before you pay.

Short answer: Measure your mattress first. A standard king is 76 inches wide and a queen is 60, and both are 80 inches long (KitchPrep). King wool comforters are sold at different widths, from 100 inches (Eartheasy) to 108 (Frankenmuth Woolen Mill), and Frankenmuth's queen is 90 by 90. Subtract, halve, and compare the result with your mattress depth. To judge warmth, compare how much wool is spread over each square yard, not the size name.

This guide is for: people buying a king or queen wool comforter in the United States who want its size and fill weight to suit their bed and bedroom.

Key Takeaways

Three figures to carry into any listing: the mattress width, the comforter width, and the pounds of wool the seller says are inside.

1. A standard US king mattress is 76 inches wide by 80 inches long (BedSizes.us), yet king wool comforters on the pages we read ran from 100 to 108 inches wide, from Eartheasy's (Eartheasy) to Frankenmuth's (Frankenmuth Woolen Mill). The size name alone does not tell you how far the sides will hang.
2. We read 8 king listings for this guide. 5 stated the wool inside in pounds or ounces, 2 gave only a density or a weight that may include the shell, and 1 gave no weight figure at all. If a listing falls in either of the last two groups, ask the seller before you buy.
3. Sellers that publish fill put about 4 pounds of wool in a queen and 4.5 to 5 pounds in a year-round king. Antipodean Home's queen holds 4.0 pounds of wool and its king 4.5 (Antipodean Home), while Frankenmuth's queen holds 4 pounds and its king 5 (Frankenmuth Woolen Mill).

On This Page

The eight sections below run from fit to fill to care, so you can stop reading once the question you came with has its answer.

The first two sections tell you whether a comforter fits your bed, and the middle three deal with how much wool you are paying for. The last three cover warmth, washing and the fiber label. Short answers to the questions people ask most often come at the end.

What size is a king wool comforter, and what size is a queen?

A king wool comforter has no fixed size. Sellers list different widths, so check the inches on the page and not the word king.

Start with the mattress. A king is wider than a queen but the same length (BedSizes.us), so the two beds differ only in width. A California king has a different shape, narrower and longer than a standard king (Turmerry). If that is your bed, you need to check length as closely as width.

Comforter sizes are not standardized the way mattress sizes are. Frankenmuth Woolen Mill lists the widest king of the three we compare here (Frankenmuth Woolen Mill), SheepskinShop's king sits in the middle (SheepskinShop), and Eartheasy sells the narrowest (Eartheasy). Across those three pages alone, the word "king" covers several inches of width. The lengths differ too, which matters if you like a deep tuck at the foot.

If you already own a duvet cover, measure it and buy the comforter to match. A cover that is much larger than the comforter lets the fill slide around inside, and one that is smaller squashes it flat. The neatest result comes when the two are within an inch or so of each other. Our guide to choosing a wool duvet insert covers how a cover should fit and how to tie the two together.

How far should a wool comforter hang over the side of the bed?

Subtract the mattress width from the comforter width and halve it. That figure is the side drop, and it should cover the mattress depth.

Side drop decides whether the bed looks covered. Take the comforter width, subtract the mattress width, then halve it. The result is how much hangs on each side when the comforter is centered on the bed. Next, measure your mattress depth and include any topper you use. If the drop is shorter than that depth, the mattress edge will show.

The table below is our judgement, built from that arithmetic and the widths sellers list. No maker publishes it.

Length works the same way. Subtract the mattress length from the comforter length and split what is left between the pillow end and the foot. If you like a deep tuck at the foot, the longer listings will suit you better.

How much wool is inside a king or queen wool comforter?

Sellers that publish fill put between half a pound and a pound more wool in a king than in a queen. The shell adds weight on top.

The wool inside provides the warmth, so fill weight is the best guide to how warm a bed will be. It means the pounds of wool inside the shell, which is not the same as what the whole comforter weighs. Frankenmuth adds a pound of wool from its queen to its king and another pound for its oversized king, and says each size gets a weighed amount of wool so warmth stays even across the surface (Frankenmuth Woolen Mill).

When a page gives only one number, find out which weight it is. Antipodean Home lists both for its king, and the total runs more than a pound above the wool fill (Antipodean Home). That extra pound is shell and stitching, so it does not tell you how warm you will be. Costco lists its king by weight in ounces (Costco), and the page does not say whether that figure is all wool.

Some pages state the fill plainly. Woolino describes its king as holding 85 ounces of wool in total (Amazon, Woolino), and Latex For Less listed five pounds of wool in its king when we read its page, which has since been taken down. Heavier kings exist for cold rooms, such as Turmerry's heavy version (Turmerry).

A king with more wool is not automatically warmer than a queen with less, because the king spreads its wool over more fabric. For the other things to check before you buy, see what to know before buying a wool comforter.

What do seller pages say about the wool in a king comforter?

We read eight king listings and sorted them by what they say about the wool inside. Three did not give a plain weight of wool.

We read eight king-size wool comforter product pages on September 26, 2026, all sold in inches and pounds or ounces. We sorted each one by what it states about the wool inside. We did not weigh or handle anything, so this is a count of what the pages say, in three groups:

1. Wool stated in pounds or ounces: five of eight. These were Frankenmuth Woolen Mill, Antipodean Home, Woolino on Amazon, Latex For Less (page since taken down) and Turmerry's heavy king.
2. Only a density, or a weight that may include the shell: two of eight. SheepskinShop gives the wool as grams per square meter, and Costco lists a weight without saying whether it is the fill or the whole comforter.
3. No weight figure anywhere in the page text we read: one of eight. Eartheasy names three temperature weights, called Cool Comfort, Perfect Comfort and Extra Warmth, but puts no number beside any of them.

You can still compare group two, because a density converts to pounds once you know the size. Group three leaves only guesswork. If a listing falls in group three, ask the seller how many ounces of wool are in the king before you order, since a king is bulky and awkward to send back.

How do you compare the warmth of two wool comforters?

Divide the ounces of wool by the square yards of the comforter. The result lets you compare a king and a queen, or two brands, fairly.

How warm a comforter feels depends on how much wool sits over each part of you, not on the total in the bag. Sellers state this as grams per square meter or as ounces per square yard. Antipodean Home explains that GSM means grams of wool fill per square meter (Antipodean Home).

The two units are not interchangeable, so convert one into the other before you compare pages. If a page gives only pounds, divide the ounces of wool by the area in square yards, where a square yard is a yard on each side. A king and a queen with the same wool per square yard will feel about as warm, even though the king holds more pounds.

Once you have that figure, match it to your room. This table is our judgement, based on how the sellers above describe their own weights; no maker publishes it.

Sellers often describe how puffy the fill is as "loft". This guide calls it height, and because height depends on how the wool was processed, the ounces are the steadier number to compare.

Is a wool comforter too warm, and what does sleep research show?

The main trial tested wool sleepwear, not comforters, and found small gains. Pick your fill weight by room temperature, not by promises.

Wool can help a warm sleeper feel less clammy. As you sweat, the fibers take up moisture vapor from the air next to your skin, and the heat carried in that damp leaves with it instead of building up under the covers. SheepskinShop, for example, says wool absorbs a third of its own weight in moisture before it feels damp (SheepskinShop). The sleeper stays drier, and that is what sellers mean when they call wool temperature regulating.

The sleep evidence is narrower than the marketing suggests. A systematic review in the Journal of Sleep Research found nine eligible studies comparing fibers in sleepwear or bedding (Li and colleagues, Journal of Sleep Research). It describes the trial sellers quote most, by Chow and colleagues, as a comparison of sleepwear made of cotton, wool and polyester for older adults. That trial tested pajamas, not comforters. The review reports that wool sleepwear helped older adults fall asleep in warm conditions, and that goose down duvets increased slow-wave sleep in young adults under cool conditions. It also cautions that "a systematic comparison of fibre types is challenging" because the studies differ so much.

In practice, no study shows that a wool comforter will fix your sleep. What you can control is the fill weight. If your bedroom runs warm, choose a lighter fill than the seller's year-round weight. If you share a king with someone who runs cold, a mid-weight comforter with an extra blanket on their side is easier to adjust than a heavy one.

Can you wash a king wool comforter at home?

Only if the seller says so. Heat, water and rubbing felt wool fill, and the care rules we read ran from gentle washing to dry clean only.

Wool fill changes if it is washed carelessly. Wet wool that is rubbed, squeezed or tumbled, especially in warm water, tangles into felt, and felting cannot be undone. In a comforter, that shows up as lumps and a thinner, smaller layer that no longer covers the bed the way it did.

Care rules differ from one seller to the next:

Follow the care instructions for your exact comforter, not a general rule about wool. A king also needs room: a drum that takes a queen easily may not let a king move freely, and wet wool is heavy to lift out.

Many sellers suggest a duvet cover so the comforter itself rarely needs washing. Woolino recommends using its wool comforter with a duvet cover to help keep it clean and extend its lifespan (Woolino). If you want one that can go in a home machine, our guide to washable wool comforters explains what the washable label means.

What should the fiber label on a wool comforter tell you?

US law requires the wool percentage on the label, even when it is small. Check it before trusting a listing that says only wool comforter.

Under US law, a wool comforter has to say what it is made of. The FTC's guidance says labels must accurately reflect the items' fiber content, the country of origin, and either the name or registered identification number (RN or WPL number) of the maker or marketer (FTC). Under the regulation, small amounts of other fibers can be grouped together, except that the percentage of wool or recycled wool must always be stated (16 CFR Part 300).

That rule helps you when a listing title is vague. Some comforters sold as wool have a blended fill, with a synthetic fiber mixed in with the wool. A blend is a legitimate product, but you should compare it as a blend rather than as an all-wool fill.

Look for "100% wool" or "All Wool" on the fill. The FTC notes that the word All can be used in place of a percentage if the product is made of only one fiber. The cotton shell is a separate part of the comforter, so check that the figure you are reading refers to the fill. If an online listing gives no percentage at all, ask the seller before you order, because a king costs more and is harder to send back than a queen.

Common questions

Short answers to six questions that come up after the size is settled, from California kings to choosing a weight.

Will a king wool comforter fit a California king bed?

It fits on width but can run short on length, because a California king is 84 inches long (Turmerry). Some sellers make a separate size: Frankenmuth lists a California king comforter that is longer than its standard king (Frankenmuth).

Can you use a king wool comforter on a queen bed?

Yes. A king leaves a deep drop on each side of a queen, and on a low bed it can reach the floor. You also pay for, and wash, more wool than the bed needs.

Does more wool always mean a warmer comforter?

Not always. What matters is the wool per square yard. A king holds more pounds than a queen because it is bigger, so two comforters with the same density feel about as warm whatever their size.

How can you tell whether the fill is all wool?

Read the fiber percentage. US rules require the wool percentage to be stated. If the fill says "All Wool" or gives the wool as the whole of the fill, no polyester or other fiber has been mixed in. If a listing gives no figure, ask the seller before buying.

Which weight should you choose if you are unsure?

Start with the seller's middle weight. Eartheasy says most people choose its Perfect Comfort weight unless they live in a very hot or cold climate (Eartheasy). Go lighter or heavier only if your bedroom or your body clearly runs warm or cold.

Does a wool comforter need a duvet cover?

Most sellers recommend one. Some comforters cannot go in a washing machine at all, and a cover takes most of the everyday dirt. Woolino recommends a duvet cover to keep its comforter clean and make it last longer (Woolino).