When choosing a diamond engagement ring, the most important factor is size. Diamonds are measured in Total Carat Weight (TCW), which represents the weight of the center stone. For example, a 1.0 TCW means the ring has a single 1.0 carat diamond. In general, 0.5–1.0 TCW is perfect for a subtle, everyday look, 1.0–2.0 TCW offers a noticeable, elegant appearance, and 2.0+ TCW creates a bold, statement ring. On this page, you’ll see real finger photos of each size (from 0.5 to 3.0+ TCW) so you can quickly compare and choose the diamond size that best fits your style and personality.