What is the length of the Cullinan diamond in millimeters?

The Cullinan diamond, renowned for being the largest gem-quality diamond ever discovered, has notable dimensions that contribute to its fame. The correct length of the Cullinan diamond is indeed 105 millimeters. This remarkable size not only highlights the diamond's physical presence but also plays a significant role in its history and value. The Cullinan diamond was cut into several smaller gemstones, which are now part of the British Crown Jewels, further emphasizing its importance in both geological and historical contexts. The other choices do not match the accurate measurement, illustrating a misunderstanding of the diamond's actual length.