Diameter: Approx. 8.9 cm Thickness: Approx. 4.4 cm Weight: Approx. 210 g It is quite large and heavy. I've heard that having more weight is advantageous for some competitions, but I don't know the details. It is an old item, so there are scratches, but it has been carefully polished, so there are no splinters. A string is attached, but since this is also old, if you plan to use it seriously, please replace the string yourself.