If you are interested in purchasing a queen size duvet cover then you will find several online retailers that provide this product. Amazon, Ebay, Wayfair, and Macy's are just a few of the websites available.
A king sized comforter will not fit in a Queen sized duvet cover.
That is okay to do as it will cover the whole bed.
it's your choice i cant remember that much
A king size will fit a queen with some extra hanging off the sides of the bed. This might be an advantage if you share the bed with a cover stealer.
Well, you could put in in there, but it will not lay flat. The queen sized comforter will be at least 20 inches wider than a twin. The length would be approximately the same.
Choosing the right size duvet cover for your bed will ensure that it fits snug and you have a good night's sleep. Therefore it is advisable to purchase a duvet for the size of your bed, thus a small size duvet for a small or twin sized bed. Avoid duvets that are too large, as they will often slip and then you will need clips to hold it down.
The answer is - there IS no standard! Duvets can come in quite a range of sizes so the duvet cover needs to fit the size of your particular duvet. The first step would be to measure your duvet itself. Some queen sized duvets are actually called full/queen or double/queen which means they are meant to fit both a double bed and a queen sized bed. In my experience, any duvet so labeled is usually a bit smaller than one labeled just queen. I clicked around to find some examples of the measurements of duvets and duvet covers. I looked at sites with directions for how to sew your own cover and at sites which showed ready made duvet covers from well-known stores and here are some examples I came across. You will see that there is a very large variation in sizes quoted so for certain it's buyer beware. Also bear in mind if you are purchasing a cover, that you may have to account for shrinkage so the size may be inflated to accommodate that. http://sewing.about.com/library/weekly/aa012699.htm (Sew your own duvet cover) says a queen duvet cover is 90" by 102" http:/blog.worldvillage.com/home/making_a_duvet_cover_queen_size.html (Making a Duvet Cover) mentions a variety of sizes for a duvet - 86" x 86", 90" x 90", 96" x 92" and gives instructions about how to add to the duvet measurements to get the appropriate finished size for a duvet cover. http:/www.sweetbedbugs.com/ducoqsi.html - queen duvet cover 94" by 99" http:/www.kohlscorporation.com/ecom/valueadded/ProductGuides/Bedding_Comforters.htm from 86" x 88" to 88" x 94" http://answers.sears.ca/answers/1367-en_ca/product/9611675S/questions.htm 88" x 90" http://www.potterybarn.com/products/p12329/index.cfm?pkey=call-duvet-covers-shams (found on product info tab) 92 x 88 HTH - if you are wanting info about sewing a duvet cover, I can provide you lots of sites with instructions for doing that.
King sized duvet covers can be purchased at a variety of department stores. Some department stores that sell king sized duvet covers include Dillards, Macy's, and JC Penney.
Queen sized doonas/duvets/bedspreads/quilts/eiderdowns are sized to suit queen sized beds. Using a size larger, such as a King size on a queen size bed, may reduce the incidence of the duvet tug-of-war, but will not fit as neatly on the bed.
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A cotbed is the equivalent in size as a single bed. One can order a duvet cover for this sized bed at Ikea, Jysk, Sears, and The Bay. Each have many available in various designs.
The disadvantages of using a double duvet cover on a single sized duvet is that it is far to big for a single duvet. It will be very difficult to sleep in as the duvet may move around which, will make it hard to sleep well. This makes it very uncomfortable and the person might end up being potentially cold as the duvet might not be on them. In the end it will just end up being a stressful nights sleep as you toss and turn to get into a comfortable and warm position. You could wrap it round yourself but, then you might become a cocoon and have restricted movement. A bit like being in a sleeping bag hard to turn left or right.