Coin grades are a system used to evaluate the condition and quality of coins. This grading helps collectors and investors determine a coin's value based on its appearance, wear, and any imperfections. Common grading scales include the Sheldon Scale, which ranges from 1 (poor) to 70 (perfect), allowing for a standardized assessment of coins. Different factors influence a coin's grade, such as mint luster, surface marks, and overall eye appeal. Coins in higher grades are generally more sought after and can command higher prices in the market. Understanding coin grades is essential for anyone interested in numismatics or coin collecting.