When sold here in the United States, those giant paperweights are usually marked Made In The PRC (People's Republic Of China) and are available almost only at AJ Wright and TJ Maxx for $9.99 (USD) each. Sometmes they have a Made In China label. Colors I've seen are blue flash and orange flash, or clear; all with bubbles. They also make them with no color flash but with bubbles and floating bits of canes or color globs, or sometimes with no color flash and with bubbles and little fishes on top.
Mine weighs in at 8 lbs., 8.3 ozs. It stands at about 6 inches high and almost as wide. In the image with the price tag, you'll notice a small oval sticker that is the manufacturer's mark - It is a stylized IL. The price tag details that one should Compare At $18.00.