Sewing muslin

I think you can just zig zag the raw edge, but use quite a reasonably close stitch (maybe half the widest setting?) and wash it to see if there are loose threads after. Most purchased ones are overlocked - which aren't turned, just stitched. So I see no reason a zig zag shouldn't be the same.

We were given some which are two layers of muslin, and they are way way better to use than the single layer ones. Just thought I'd throw that in there

I got some muslin at spotlight that is slightly thicker, with a square kind of indent (sorry, don't have the technical lingo to describe it really well!)...but that was fine single layer for small wipes and meter square wraps. With the other "smooth" muslin I found, like michhell that double layer was best.
:-)

I turned over the edges...but thats cos i never thought of trying any other way...!!

After much washing one of my washcloths measures at 21 x 25cm, but I'm fairly certain it started square!

I can't remember what that fabric is called either - it is much thicker (double muslin?) and looks like a thread has been pulled every inch or so to make squares. I've used it to make 'muslins' to cover the little'un from the sun etc, but actually haven't used them much!

while speaking of wash cloths and flannels.
buy a cheap towel when they are ridiculously cheap like 3.99 each

cut it into squares, overlock the edges and wha-la a ton of facecloths for half the price of brought ones.
and cos the edges are overlocked they dont have sharp thick corners so are perfect for cleaning babies face and bits as they dont hurt the same
(i scratched my eyeball one day with a facecloth and it bloody hurt - since upgrading to overlocked edges ones its never happened again)

but these must be overlocked. zigzagged just doesnt work the same

oh, and mine are double layers of double muslin, and are overlocked