They aren't cheap, but they can be cut up to size and will deaden most feet, if used on a regular basis.
Two drawbacks...1- outrageously expensive -3"x6" can be cut to fit; and 2- make sure where you stick it on? that the skin is clean and dry before the 'sticking'. Otherwise they come off soo easily that it's wasted effort and treatment. They don't eliminate the pain per-se, just numb it to the point of being dumb-numb.
Good Luck! 's!!!!!! - j