The pendant measures just over approximately 1 and 3/8 inches high, including the bale, by just over about 11/16 of an inch wide, and about 3/16 of an inch deep. (Included you will see a US Quarter in the photographs, for the measurement-challenged and ruler-averse.) The bale opening measures just over approximately 1/8 of an inch, or about 3.5 millimeters, wide. Stamped, "925", on the back of the bale, unsigned.
The chain measures about 17 and 11/16 inches long, from end to end, and will fit (closed) at about 17 and 9/16 inches in length. The chain is approximately 1 millimeter, or just under about 1/16 of an inch, wide. Stamped, "925", on the spring ring clasp, stamped, "925 Italy", on either end, unsigned. Combined weight of the chain and pendant is approximately 5.5 grams, which includes the amber weight, naturally.
This necklace is in very good vintage condition, with only the expected light surface scratches and patina. No damage to the amber. The chain has a couple of very mild bends, no breaks or creases. The clasp works well and holds securely. Both pieces hand polished, but may still have some tarnish, especially on the chain.
A very pretty vintage Italian Sterling silver round snake chain necklace, with a large, colorful hinged amber cross pendant. Beautiful, with lots of interest in the amber.