it is possible but it will take about a month to ship
Yes, there are many. I know two such mattress, one is the California King size Saatva mattress which is 72 inches wide and 84 inches long. Another which is the Extra Long or King Size Saatva Mattress. It is 76 inches wide and 80 inches long. Their website is Saatva.com
The difference between a single and double is that a single mattresses is 39 inches wide and 75 inches long. Double mattresses is 15 inches wider at 54 inches wide and 75 inches long.
A full size mattress is 54 inches wide and 75 inches long. It is the smallest mattresses recommended for couples.
A double mattress is the other term used in reference to a full sized mattress or standard size mattress. It measures 54 inches wide and 75 inches long.
Queen size mattresses are approximately 60 inches long by 60 inches wide. The depth of the mattress varies depending on the mattress brand, and whether the mattress has a pillow top or not.
A king size mattress is 76 inches long and 80 inches wide. It is the second-biggest commercially available mattress size, behind the California king.
A full-size flat sheet is 54-inches wide and 75-inches long. A full-size fitted sheet is 81-inches wide and 96-inches long. A full-sized mattress is 54-inches wide by 75- inches long.
One twin mattress is 39 inches wide and 75 inches long. One twin XL mattress is 39 inches wide and 80 inches long. A standard king size mattress is 76 inches wide and 80 inches long. So technically two regular twin mattresses don't exactly equal a king size mattress because they are too short by 5 inches. Two extra long twin mattresses make a more accurately sized king size bed. In a pinch you could put them sideways and sleep across the king bed.
In the UK we would call it a 'king size' mattress.
A twin size mattress is 39 x 75 inches. So it is 39 inches wide. However, if you are thinking about buying a comforter for your mattress I would suggest getting it in size 68x86.
A bed 68 inches wide and 82 inches long would need California King sized sheets, although the standard California King mattress is 72x84. A Queen is generally 60 inches wide while a King size mattress is usually 76 inches wide. Both King and Queen beds are 80 inches long.
A twin mattress is 75 inches long and 38 inches wide. This is smaller than a double bed, and is considered a bed for a child. Two adults would not fit on a twin size bed.