Sold by piece by weight. Sizes may look similar depending on shape/thickness. Each AAA Ruby stone has been weighted

Pictures taken both in natural and artificial lighting 

XS: 9g to 10g

SM: 16g to <20g

MD: 20g to 30g

LG: 31g to <41g

XL: 50g to 53g

Stones cranked up by Jay Essex and Diana R. Anaya (Dianimal)