The kerosang/kerongsang is a set of 3 brooches used by the Peranakan Straits Chinese ‘nyonyas’ to fasten kebaya/baju panjang. Usually consist of either three identical circular brooches connected with chains.
 
Motif: butterfly with Cubic Zirconia.

Each kerosang measure about 4.5 x 2.5cm
Each link chain measures approx 8cm long.