This model varies from my Soda Can Koozie to be used as a perfect-fit coaster so the can sits right in the middle and won't fall off as easy. And of course a quick pattern around the edge! Overall diameter is 90mm to allow for some wiggle room, while the middle of the can sits on a raised section, with a diameter of 44.5mm and a height of 5.5mm with a filet going all around.