The earring hooks and connector rings on these earrings are silver plated. The blue beads are Czech fire polished beads. The bead dangling from the bottom is a clear Swarovski crystal. The diameter of the earrings is just over 1/2" and the length from the bottom of the earring hook is 1". The earrings include plastic backs. Shipping: UNLESS you request otherwise, I ship everything by First Class mail with a tracking number. Upon your request, I can ship by Priority US Mail for $6.00. (Please see my shop policies.) If your shipping address is in Alaska or Hawaii or outside of the U.S., please message me before you purchase so that I can calculate shipping costs. Thanks for shopping!