A souvenir from a trip abroad. Two holes. Thickness is 4mm at the thickest point. - The spots inside look quite brown in the photo, but they appear faint to the naked eye. - I don't think the dark color is mold (it was there from the beginning, but I'm not certain). #UnusualButtons #Handicrafts #Costumes ☆ ¥200 discount per item when bundled with other listings.