These chestnut bowls are size XL, and fit these biconvex stones snugly. They have been treated with Monkey Butter. One lid has been replaced - covering up this was probably why came to Baduk Club with an ugly dark finish. You can see the process of stripping them and refurbishing them here:
There are 181 black and 180 biconvex white pieces, about 8.5-9mm thick.
This item ships from Colorado, USA. Within 3 business days of purchase you will have a tracking number that you can use to sign up for notifications.