Oops
I was expecting an Imperial/US unit of measurement with that grid and was disappointed it was a metric measurement. I read the description again to make sure I didn't miss a mention of the measurement, but didn't see it. Did I miss it? As for usefulness as a tack tape, I found it comparable to other tapes I have used, so it was a good tape in that respect. Yes, I would recommend it to a friend for tack tape, but not for US measuring!