Make a fitted sheet from a flat sheet

[karadinart]

So, I got a new sheet set, and I sleep European style, that is, I have a fitted sheet and a duvet cover, I don't use the flat sheet that comes with the set, the material is too sheer for curtains, so I decided to make the flat sheet into a fitted one I will actually use!

here is a good tutorial
http://thenewlighterlife.com/how-to-make-fitted-sheets-from-a-flat/