What size weighted blanket should you get?

Short answer: buy the blanket that covers you from shoulders to feet with a few inches to spare, and ignore the size of your bed. For most adults that is a 60 x 80 in blanket, sold as “twin” or simply “adult” depending on the brand. Overhang is not a bonus - it is weight hanging off the side of the mattress, pulling the blanket off you all night.

This is the question people ask second, after weight, and it is the one where the obvious answer is wrong. You have bought bedding your whole life by matching it to the mattress. A weighted blanket is the one piece of bedding where doing that actively makes it work worse.

Why body size, not bed size

A weighted blanket works by distributing a fixed number of pounds across the area of your body. Two consequences follow, and both of them argue against a bigger blanket.

• Spread the same weight over a larger blanket and you feel less of it. A 15 lb blanket in a 60 x 80 in size puts noticeably more pressure on you than the same 15 lb stretched across a king-size 88 x 104 in panel, because a large share of those pounds is now lying on the mattress either side of you rather than on you.
• Overhang drags. Weight hanging over the edge of the bed has gravity working on it all night. It creeps, it slides, and at some point between 1am and 4am it takes the rest of the blanket with it onto the floor. People describe this as the blanket “never staying put” and buy a heavier one, which makes it worse.

The rule that falls out of this is simple: the blanket should end at roughly the mattress edge or just inside it, and it should cover you from shoulder to foot. Nothing more.

The sizes, and who each one is for

Dimensions vary a little between makers, so treat these as the common sizes rather than a standard. Match on your height first.

Note the overlap between queen and twin XL. Several brands label a 60 x 80 in blanket “queen,” which is a mattress size, not a body size. Always check the dimensions in inches rather than trusting the word.

Start from your height

The practical test is coverage from the top of your shoulders to a few inches past your feet. Measure that rather than guessing from your bed.

• Under about 5 ft 4 in: a 48 x 72 in blanket covers you fully, and the smaller panel concentrates the weight pleasantly.
• Roughly 5 ft 4 in to 6 ft: 60 x 80 in is the standard answer and will be in stock in the widest range of weights.
• Over about 6 ft 2 in: you want an 80 in or longer panel, which in practice means checking the queen listings for one that is long rather than wide.

Width matters less than length for one person, with one exception: if you are a determined roller, a slightly wider blanket survives the night better simply because there is more of it to roll into.

Couples: the honest answer is two blankets

This is the section people arrive looking for, so here it is without hedging. One king weighted blanket shared by two people is almost always worse than two separate blankets, for three reasons.

The weight will be wrong for at least one of you. The weight convention is based on an individual’s body weight, and a king blanket is sold at a single total poundage. Two people of different sizes under one blanket cannot both be correctly weighted. Our page on how heavy a weighted blanket should be exists because getting this wrong is the main reason blankets end up in a cupboard.

It transmits movement instead of absorbing it. One of the quiet benefits of weighted bedding for a light sleeper is that it dampens your own movement. A shared blanket does the opposite: your partner turning over now moves twenty-five pounds that is also lying on you.

It is extremely difficult to handle. A king weighted blanket at a credible weight is a two-person object to move, to strip and to put back on the bed, and it will not fit in most domestic washing machines - see how to wash a weighted blanket.

The arrangement that works is two individually-sized blankets side by side, each at its own correct weight, on top of a shared flat sheet. It looks odd for about a week.

Sizing for children

Children’s sizing is a safety topic before it is a comfort one, and we are not going to compress it into a paragraph here. The short version is that an adult blanket on a child’s bed is mostly overhang, that weight must be scaled to the child’s body, and that there are firm age and supervision rules that come before any of the sizing arithmetic. Those rules are set out on the weighted blankets for kids page, and on the teens page for older children. Read the safety section there before buying anything.

How size and weight interact

The two decisions are not independent, and brands do not always make the relationship obvious. The number that actually governs how the blanket feels is pounds per square foot, not total pounds.

That means a 20 lb blanket in a 60 x 80 in size and a 20 lb blanket in a king size are genuinely different products, even though the listing weight is identical. If you are replacing a blanket that felt right and buying a different size, keeping the same poundage will not keep the same feel - going bigger will feel lighter, and going smaller will feel heavier.

A practical consequence: if you loved a weighted blanket on a sofa and want the same feeling in bed, you usually need to go up in pounds when you go up in dimensions, not keep them the same.

The sizing mistakes we see most

• Buying king because the bed is king. The most common one, and the most expensive to fix.
• Buying extra length “to tuck in.” Weighted blankets are not tucked. The weight is the thing that keeps them in place, and tucking one under a mattress creates tension that pulls it off you.
• Buying a throw as a bed blanket. A 40 x 60 in throw does not reach your feet, and partial coverage is the one configuration that reliably feels unpleasant.
• Ignoring the duvet cover size. If you want to put the blanket in a cover, the cover has to match the blanket’s dimensions rather than the bed’s. A loose cover lets the blanket shift inside it all night.
• Not checking the washing machine. Size and washability are the same decision. Work out what your machine takes before you buy, not after.