Holds 6 100mm diameter by 2mm high coasters. One version with one notch and one with 2 notches. One holds 6 100mm diameter by 2.7mm high coasters, has 4 notches.
Love it very much. I modified the height to 44mm to accommodate 6 coasters with rubber bumpers on the bottom to keep them from sliding from https://makerworld.com/en/u/2136363072. Made a set in Overture PolyTerra Muted White as pictured and Overture PolyTerra Army Blue