Also the size of those 4x6" patches? Well, I cut them up with a pair of 'dedicated scissors' [the glue stuff is very sticky on the scissors and ....] and use 2/4" or 3x3" bits where I need them, when I need them. Remember you can't use any one on you for more than 12 Hours. I use them about every other day sparingly as needed. At times I find I'm more irritated by the adhesive than the actual stuff in the patch.
I've found that for some reason the patches' stuff can go in deeper than topicals, but if I've a deep pain, the Tramadol and the like is MUCH better. - j