The "Fiery Opal" cabs have got to be my favorites of all the Vintage GLass cabs we currently have; they are sooooo gorgeous!! Full of color and an ethereal glow, I can't wait to use some of these myself! Made in West Germany of excellent quality glass, these are a "Navette" shape,(oblong with pointed ends and a domed top) and measure 6mm long and 3mm wide.