This is a Royal Copenhagen, Denmark small plate, dish, butter pat, plaquette or tea bag holder in blue and white porcelain in the Pigen Mid Gulhornet or Girl With A Horn by the made 1903-1969.

The small plate is from a sculpture by artist Holger Christensen.  

The little plate is 3.25 inches in diameter... just a tad bigger than some of the others...and could be used to hang on the wall with the hole in the rim at the back, hold a tea bag or butter or sit as a decorative pin dish to add color.

The dish is in excellent used vintage condition with no chips, cracks or wear. Lovely!