These vintage stones measure 15 x 7mm. Made in Czechoslovakia. Very limited! We just love the character of these old beauties and think you will too. Due to their age, some may have missing foil which can look like dark spots from the front if you look closely. But, who does? These are pretty old so some small obscure nicks may be seen on the outer edges if you look very close. You will receive 4 stones per lot. These are very rare and limited.