The clip on earrings measure approx. 1" by 3/4" and the pin/broach measures approx. 2 1/4" by 1 1/2" They are made of Sterling Silver and are marked on the back. The design on them is the Goddess of Lightning. Siam jewelry uses a technique called Niello a combination of copper, silver and lead sulfides used in an inlay on engraved or etched metals. Most of it was completely hand made. Nielloware jewelery and related items from Siam (Thailand) were popular gifts from american soldiers who were taking R and R, to their wives or girlfriends back home from the 1930's - 1970's and tourists bring home souvenirs and gifts from extended vacations and trips abroad during this period. Siam jewelery is very collectable because of the wide variety of items, variety of subjects, and the mystic of the country. Please email me with any questions. Thank you for shopping with us at Something Wonderful.