Easy way to sew cloth wipes?

[firststella]

What is the easy and quick way to do that? I have some (around 50) flannel cotton squares (8 by 8in approx). Do I have to hem the fabric? Or zigzag stitch? (How wide the stitch?)? (I don't have a serger)
If i dont hem it will unravel, correct?
TIA!

(I Have flannel cotton squares that I cut a year ago from old receiving blankets (was motivated to use cloth wipes) but they are still untouched. Now as I'm expecting another baby and DH agrees with cloth wipes, I want to use cloth wipes)