We have 4 Heart Shaped Plastic Trinket Boxes.  They come from a shop which closed in the 1970's leaving it's stock on the shelves from between the 1950's - 1970's. The only marking I could find is on the back - "made in Hong Kong". They are made of white plastic. The top is extremely intricate in detail with the sides being fluted and the back having minimal detail. These measure about 2 1/4" long x about 2 1/4" in width x about 3/4" in height. They are very pretty. The price is for 4 of these trinket boxes.