Hi,
This seems to be the newsgroup with the most hits on my preliminary search, but can't really find the answer yet, I tried Google with little result.
Someone gave me a box spring and mattress to replace a what I thought was a "full" size set that worn out and I discarded. It says "Serta Perfect Sleeper" on it (and I'm old enough to remember those great Joey Heatherton commercials advertising this brand). I don't know how old the mattress/box spring is, but it don't look real new. I should also state that I'm in the US, as maybe different countries have different bed sizes?
I had to pound the box spring into the frame with a hammer to get it to fit flat, and the mattress just fits on top, with no leeway at the headboard or footboard (is that what it's called?) to put sheets on, etc, without lifting the foot of the mattress up and then pushing it back down.
I measure the mattress to be 53 (but probably 54) inches wide by 78 inches long. My fitted sheets that I had from full size the mattress before that, and one prior, has to be forced on by lifting an edge of the mattress, and then pushing it back down, stretching the sheet, which usually pulls back off one of the mattress corners by the next morning. Very frustrating dealing with that on a daily basis.
After asking neighbors if they have odd size sheets that may fit, one neighbor gave me a bag of fitted sheets, in which I found one that actually fits, something the neighbor called a deep pocket sheet that she said may be in the bag of sheets.
I did research on bed sizes, and cannot find anything with a 78 inch length. What the heck do I have, and what do I get for fitted sheets, as the one the neighbor gave me is somewhat worn and I'll need more soon. Seems like I can get regular sheets and blankets to fit OK. Thanks.