These large icicles are hollow flameworked borosilicate glass. These are exactly like the  large icicles in my installation Ausklingen (Fade Away), and their hanging mechanisms are identical: they are strung with plastic coated steel hanging from a fishing swivel. Each one is one of a kind and comes with the following label: 
 
WHEN F.W. WOOLWORTH FIRST BROUGHT CHRISTMAS ORNAMENTS TO THE UNITED STATES IN THE MID-EIGHTEEN HUNDRED’S, HE GOT THEM IN LAUSCHA, GERMANY, A SMALL TOWN IN WHAT IS NOW EX-DDR THURINGIA. WHEN I FIRST STARTED FLAMEWORKING, THE FIRST THING I DID WAS GO TO LAUSCHA TO STUDY. I WAS QUITE FORTUNATE TO STUDY WITH AN ENTIRE GENERATION OF MASTER GLASSBLOWERS NOW NO LONGER WITH US. THIS ICICLE ORNAMENT IS BASED ON AN OLD LAUSCHA ORNAMENT AND REFERENCES NOT ONLY THE BIRTHPLACE OF ORNAMENTS, BUT ALSO THE HOME OF FLAMEWORKING. EACH ICICLE IS ONE OF A KIND AND MADE FROM BOROSILICATE GLASS IN SCOTLAND BY CARRIE FERTIG.
 
The size of the icicles are first determined by their diameter: large are 30mm (1 3/16") in diameter. Large icicles are then priced according to length. Recently I have added some very large ones up to 55.5cm (22"). So when I say large, I do mean huge. These will make a massive impact in a window, hanging from a chandelier, or wherever you want to make a huge statement like "our house is Christmas central" or "winter is here!" regardless of the weather!