Binding the mug rugs.......

It took me an hour to do the first 2 bindings on 8" mug rugs.  The next 4 took an hour and 15 minutes.  I am pretty particular about how it looks and still feel that they need a bartack in every folded mitered corner of the binding.  I have seen the fabric pull out of a folded miter after washing so it is necessary.  I hope I can speed it up to 15 minutes for each by the time I finish the whole pile of them.