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When you say mattress that is the top. Boxspring is the bottom. So im guessing you have mattress and boxspring extra long. The answer is yes. A twin extra long mattress will fit a regular twin bed frame. The length is just longer not the width.
No. Two twin size mattress will fit a king size bed frame.
no.
It depends on how the frame is constructed. If the "ends" are open, then maybe. A Single XL is the same width as a Single, but slightly longer.
Mattress sizes are notoriously confusing, but in general, a "double" is significantly wider (as in, over a foot wider) than a twin and will not fit on a twin frame.
yes they will fit in witdth, but not in length
No. If you have a box spring to support the sleeping mattress, the answer is yes, but not a sleeping mattress by itself. The frame is too short and the foot end of the mattress will hang down and touch the floor.
it depends if your mattress is a bit big, but most likely not
Yes, a full size mattress will fit on a queen size bed frame. It may be just a tad bit smaller than the frame, but not too noticeable. I have a full mattress and use full/queen sheets and bedding all the time.
No. Two twin size mattress will fit a king size bed frame.
Only if the frame will adjust out to the width of the king. King mattress sets are 16 inches wider than a queen.
Yes, but it will hang off the bottom by an additional 4-6 inches.