Remixed NASA chainmail model and turned it into a hexagon shaped coaster. I shrunk it down vertically about 70% to 5 mm. Should be easy to print. I would not recommend printing at a low resolution.
(btw the stringing in the photos is probably my fault. I forgot to disable some settings)
May seem a little large for small cups, but for wider cups and bottles it seems to be a good size.
Max length approx 11.5 cm
Min length approx 10 cm
If Large is too big for your liking, I have included a smaller size
Max length approx 9.5 cm
Min length approx 8 cm
Coaster Holder
@adityakamath_493158 has created a holder for 6 of the small-sized coasters, which can be found here: https://www.printables.com/model/571711-holder-for-6x-hex-nasa-fabric-coasters
The author remixed this model.
Scaled down vertically about 70% to 5 mm, arranged in 2 hexagonal patterns