Try Lands End.

I second the recommendation for Lands' End. Yes, they sell sheet sets, but they also sell sheets separately, except for pillow cases. They always come as a set of two.

Lands' End will tell you in the item description what size and depth mattress the fitted sheets will fit. Our mattress is 16" deep, and we don't have any problem at all with the sheets from Lands' End, as long as I make sure I get the ones that will fit 16" deep mattresses.

Here is a link that might be useful: Lands' End Bedding - Sheets

Wal-Mart!!! I looked and looked to buy single sheets....to match the bedrooms to use to protect the quilts/bedspreads from the cat hair! (MUCH easier to wash those weekly than to wash the quilts/bedspreads!)

We buy single sheets for quilt backs , and can only find them, reasonably priced, at Walmart. I used to go to a couple of outlets for companies like Stevens, Wamsutta, etc. but they don't exist any more in our outlet mall.

Walmart here too!

Macy's or the thrift shops.Here i like the DAV thrift shop.I just got a coordinated set last week for the spare twin bed and they were under 5.00 total for both.Neither had any spots,tears or loss of colors.Got a soft yellow bottom sheet and a yellow stripe top sheet,and are very good quality.
kathi

Thank you for the responses; I wouldn't have guessed Walmart! I bought a SET of flannel sheets at Walmart this winter for the guest bedroom and it is the only set that didn't shrink when I washed it in hot water. I'm not looking for sets as I've bought sets from Linens & Things, Macy's, TJ Maxx, none were cheap and all were for 19" mattresses. My mattress is only 14" inches deep, king, and they are really impossible to fit properly. I like the idea of flat sheets for both top and bottom, they certainly would be much easier to fold and store. Also, I use standard or queen size pillows, so it would be better to buy the cases separately also. Thanks for your help. I'm off to Walmart, there's no Lands End close by that I know of. I guess we're not close enough to land's end, LOL.

Lands' End dot com is a website. They also mail catalogues. Lands' End sheets do not shrink, are cut generously and don't wear out.

Thanks for the info, Linda. I'll check them out. You learn something new everyday, at least I did today. "don't wear out", wow!

Check to see where they are made. Sheets made in China etc seem to last longer than those in India.

I buy Northern Nights from QVC. They have deep pockets and I've never had a problem with shrinkage. When I was first married I bought cheap sheets that were scratchy and pilled. BFF tought me about thread count.

Thread count is very important. Don't just trust what it says on the package. Use your eyes and use your hands to feel the sheets. There have been numerous reports of thread count on packages being deceptive. And don't forget to consider yarn size either. Your very best sheets will be 120. The long strong strands of Pima cotton are coveted for linens. Egyptian cotton offers superior quality also.

No matter how high the thread count is the sheets must be properly finished or they won't last. Singeing and mercerizing are just as important as thread count when looking for quality sheets. I give sheets a sniff test and if I detect a lot of sizing I assume they are cheaply made and weren't finished properly.

I find decent sheets at Homegoods and also scour the department stores when they have clearance sales. The higher end brands offer single sheets.

You can have sheets custom made if the mattress is an odd size.

Here is a link that might be useful: Thread Count Scam