This is a Royal Copenhagen mini plate, specifically the "Kongeskibet i Københavns Havn" (The Royal Yacht in Copenhagen Harbour) edition from 2010. 

• It is a collectible faience or porcelain mini plate, also known as a plaquette. 

• The plate is approximately 3 to 3.25 inches in diameter. 

• The text on the back indicates it is design number 53 for the year 2010. 

• It features a beehive backstamp, a common mark for Royal Copenhagen items. 

• These items often have a small hole for a wire hanger, as seen in the image, or can be used as a butter pat or trinket dish