I fold mine in half lengthwise (there will be 4 layers of fabric) then I wrap it with a 12x6" ruler and slide the ruler out. No matter how many yards of fabric I have this gives me a uniform size of fabrics folded on my shelves.
Sewing room 2
[ATTACH=CONFIG]153567[/ATTACH]
Sewing room 1
[ATTACH=CONFIG]153649[/ATTACH]
Sewing room 3
[ATTACH=CONFIG]153650[/ATTACH]