Postcard coasters are 3 7/8″ x 5 3/8 with rounded corners — the ones I have are medium weight. Though heavy weight is available. Calender is an idea I had. We could each do 1 month if we came up with 12 people.. but we could do something else instead if some one has a good idea for it?
I buy coasters in bulk – have to buy it by the case of 1000 though. Im happy to buy a case(s) and split it out among those interested.
How many coasters would everyone want? A sleeve is 125 for medium weight , that gives you a few to experiment on and would be easy for me to ship out to anyone who wanted to buy them from me. Though I could do smaller amounts if you wanted. So you would have the cost of the coasters (however many you wanted) + shipping.
you should measure them and see how thick they are I have coasters that are 2mm as the thickest and 1.4mm as the middle then there is even a lighter (thinner one). So the thinnest or medium might work just for future reference