The 2 largest are not spheres, they are considered flat circles and are the oldest! Largest pieces are 20mm, the smallest pieces are 12mm.
Please view last picture of more ancient vintage chinese pieces available. This item is in the category "Antiques\Asian Antiques\China\Necklaces & Pendants". The seller is "thecoffeegyrl" and is located in this country: US.This item can be shipped to United States.