These are bridal bangles of Gujarati community in India and are known as "Chudlo".These are the special types of set of bangles, which are worn by a bride at the time of her marriage with a special saree known as Panetar.Usually these bangles are in red, green and ivory white colors to match the Panetar Saree. Before marriage the bride's maternal uncle "Mamaa" puts Chura in the arms of bride. Originally these bangles are made out of elephant's tusk. But the one shown in the picture i.e. one which you will receive are made of plastic in red,green & elephant's tusk color
Diameter of these bangles are 2.5 inches.
Circumference is 7.85 inches.
Indian bangle size is 2-8.