The optimal carat size for an engagement ring depends on individual preference, budget and the design of the ring. Typically, engagement rings range from 0.5 to 1.5 carats, while a 1 carat diamond is classically considered standard, eye-catching and highly visible on the ring finger. Larger diamonds with a presence of more than 1.5 carats often require a personal consultation to find the optimal combination of carat and design.