This is a Showa-era retro, triangular, blue swirled glass. The size is approximately 14 cm in maximum diameter and 5 cm in height. Given its shape, it's likely an ashtray, but its interesting form means it could be used for various purposes. I believe it's a rare item that you don't often see. However, as it is old glass, please only purchase if you don't mind its age, as shown in the photos. #ShowaRetro #RetroGlass #AntiqueGlass #RetroGoods #AntiqueGoods #SwirledGlass #BlueGlass #Ashtray #RareItem