Vintage MCM Blenko Clear Crackle Glass Bottle Decanter Stopper Manganese 365nm. MEASUREMENTS Tall 9 ” and 2 “Wide see pictures w ruler for reference. I TOOK THE PICTURE WITH AN UV FLASH LIGHT POINTING DIRECTLY AT THE ITEM UV pictures were taken using 365nm Black Light UV Flashlight and in complete darkness. Make sure to use a black light 365nm for same results (glow).