Knowledge Stud earrings, Antique Wax seal impressions These are the impressions of an antique wax letter seal This wax seal impression features a raven. As a collector of bright objects, the raven stands for the symbol of knowledge. It is also the emblem for divine providence. The shield shape is the emblem of protection and secure covering..... Size......... The earrings measure approx. 10.00mm across the diameter. This may alter slightly due to the fact that each one is made individually by hand. The back of the earrings are made from sterling silver.