Sizing glass stoppers for antique bottles.
I found three old glass apothocary bottles at Goodwill that are missing their stoppers. I found a vendor on ebay, selling stoppers in sizes 9, 13, 16, 19, 22, and 27, but I have no idea how those numbers relate to my bottles. All three have ground glass openings that measure 7/8" in diameter. Can anyone tell me what size number I should order?