If anyone is wondering how to size & cut the fabric for cloth muslin casings, here are a few details.
First, when buying cloth, you MUST use a natural, un-treated (non-permanent press) 100% cotton fabric. Do NOT try to use a poly-cotton blend and do NOT use one that's been treated for permanent press.
Sizing the fabric is not that difficult. Here's the formula:
Length = Whatever length you want.
Width = "Desired Diameter" X 3.1415 (pi) + 1/2" (for 1/4" seam allowance)
So if you want a 3" diameter sausage it'd be:
3 X 3.1415 + 0.5 = 9.9245 Just round it to 10"
A 2" Diameter sausage would be:
2 X 3.1415 + 0.5 = 6.783 Just round it to 6.75"