These black plastic bowls are size M, and they fit the size 22 stones with plenty of room to spare.
The stones were not counted, but are about 6-7mm thick and not as wide as standard stones. If you happen to have a board that is smaller than standard size these might be the perfect fit.
This item ships from Colorado, USA via UPS or USPS. Within 3 business days of purchase you will be emailed a tracking number that you can use to sign up for notifications.