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Baseball Field Dimensions: A Guide for Players and Fans

Baseball is one of America’s most beloved pastimes, with millions of fans and players alike taking to the field every year. But for those who are new to the sport, or even seasoned veterans, understanding the dimensions of a baseball field can be crucial to success. In this article, we’ll break down the key measurements and features of a baseball field, including the playing field, the foul lines, and the backstop.

The Playing Field

The playing field is the heart of a baseball diamond, and its dimensions are standardized across all levels of the sport. From home plate to the outfield fence, the playing field must measure at least 325 feet in distance, with a maximum of 400 feet in center field. The distance from home plate to first and third base is set at 90 feet, while the distance between second base and either first or third base is 127 feet, 3 and 3/8 inches.

The Infield

The infield is the portion of the playing field that includes the diamond-shaped area around the bases. This area is typically made of clay, and its dimensions are also standardized across all levels of the sport. The distance from the pitcher’s mound to home plate is set at 60 feet, 6 inches, while the distance between each of the bases is 90 feet. The pitcher’s mound itself must be a raised area of dirt, measuring 18 feet in diameter and with its center located 10 inches above the level of home plate.

The Foul Lines

The foul lines are the lines that run perpendicular to the third- and first-base lines, marking the boundaries of fair territory. These lines extend from home plate to the outfield fence, and are set at a distance of 90 feet from each other. The distance between home plate and the point at which the foul lines meet the outfield fence can vary depending on the configuration of the field, but must be at least 325 feet.

The Backstop

The backstop is the fence or wall located behind home plate, which serves to protect the fans and players from foul balls and wild pitches. Its dimensions can vary, but must extend at least 25 feet behind home plate. In professional baseball, the backstop is typically made of a material that allows the ball to bounce back into play, while at lower levels of the sport it may be made of solid materials like chain link or brick.


Understanding the dimensions of a baseball field is essential for players and fans alike. Whether you’re a Little Leaguer or a Major Leaguer, knowing the exact measurements of the playing field, the infield, the foul lines, and the backstop can help you make better plays and appreciate the game even more. We hope this guide has been helpful, and that you’re now ready to hit the field with confidence.