I can be very forgetful & keeping this handy “wallet grinder” available has been so helpful! It is sturdy and was able to easily grind up an 1/8th in a quick amount of time. My roommate lost her grinder this week while we were moving and when she mentioned it I pulled out this card to her bewilderment & excitement lol - the same size as a business or debit card, slides and fits perfectly in my Hobo wallet. It is well designed, but in the future I would attempt less graphic design over the grate for more grinding room since the surface area to grind is only about 1.5 inches. A line of wallet grinders with pretty plants & house plants on them would be SO cute. Or zodiac ones