The Stainless Steel Curb Chain is about 5 1/4 inches long with a matching bead at the end. The Fluorite Pendulum is about 2 inches long, about 9/16 inches in diameter, and weighs about 15 grams. This would be considered a light weight gemstone pendulum.
The small Stainless Steel Chamber is about 7 mm (9/32″) diameter and 5 mm high. More space is available in the chamber cap.
Remember not all gemstones are the same. Expect some slight variations, especially Fluorite.