The Coasters are about 3.94 inches (100 mm) in diameter wide and about 2mm thick. For more grip i got suitable cork coasters to stick on the bottom of the coasters with 1mm thickness. They are for example available by Amazon. 

An Storage for the Coasters is also available, just click here: Storage for Coasters

Feel free to leave a comment or review if you like the model or have any suggestions for improvement. I’m constantly working on improving my models. :)