The Ultimate Guide to Baseball Field Dimensions 2025

Fair play starts with the tape measure. When baselines, pitching distance, and the home-to-second diagonal match the league’s age group—60-foot bases for Little League, 90-foot for pros—any field becomes a regulation diamond, ensuring every dash, steal, and throw happens on equal ground.

Before diving into baseball field measurements, there are a few baseball-specific terms to understand when talking about how to measure your field:

Baseball Field Glossary

• Backstop — High fence or netting behind home plate that protects spectators from foul balls.
• Baseline — Straight line between adjacent bases; four baselines create the infield square.
• Batter's Box — Rectangular area on each side of home plate where the batter stands while hitting.
• Center field fence — The section of fence in the middle part of the outfield. Center field fence measurements start from the back of home plate in a straight line to the center field fence.
• Foul line — A set of two straight lines chalked on the field that start at the back of home plate and go all the way to the left field and right field foul poles; separates fair and foul territory.
• Foul poles — Two vertical poles, usually with a mesh wing at the top, placed at the very edge of left field and right field where the outfield fence meets the foul lines.
• On-deck circle — 5-ft-diameter circle where the next hitter takes warm-up swings.
• Pitcher’s mound — Raised circle, 18 ft in diameter, with the pitching rubber at its center. From here, the pitcher delivers pitches to the batter.
• Pitching rubber — White slab, 24 in × 6 in, from which the pitcher pushes off with his or her foot to build velocity toward home plate when pitching the ball.
• Warning Track — Strip of contrasting surface just inside the outfield wall padding that alerts fielders they are nearing the fence.

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How to Properly Measure a Baseball Field

• Anchor at Home Plate: Measure from the back edge (white, not the black bevel).
• Home to First: Back of home plate to back corner of first base.
• First to Second: Back corner of first base to the exact center of second base.
• Second to Third: Center of second base to back corner of third base.
• Third to Home: Back corner of third base to back tip of home plate.
• Confirm the Square: Measure both diagonals (home to second and first to third) to ensure the distances match.
• Mark the Foul Lines and Arc the Infield: Apply chalk lines from home plate through first base and home plate through third base. After that, radius the infield arc equal to the baseline.

Official Field Dimensions by League

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Need Baseball Field Guidance?

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FAQ: Top Baseball Field Dimension Questions

How big is a high-school baseball field?

Infield: 90 × 90 ft square; pitching: 60 ft 6 in; outfield: 300 ft down the lines, about 400 ft dead center.

What is the home-to-first distance?

90 ft in the Major Leagues, 90 ft in the NCAA, 90 ft in high school, 80 ft in Pony Leagues, 70 ft in Bronco Leagues, 60 ft in Little League, and 50 ft in Pinto Leagues.

How much longer is the throw from home to second than the batter's sprint to first?

On a regulation 90 ft diamond, the catcher's throw to second base covers about 127 ft 3 3/8 in, nearly 37 ft farther than a runner's dash to first. That extra ground requires catchers to possess elite arm strength and release times.

What other plays does the home to second distance influence?

Besides thwarting steal attempts, this distance dictates double-play depth for middle infielders. A few inches either way can shift defensive strategy entirely.

Why is this distance scaled down on youth fields?

Younger players cannot match big league arm strength. By shortening the base paths, youth leagues keep throws attainable, promote more action, and ensure games stay competitive.

How many feet are between bases in baseball?

Exactly the baseline length: 50, 60, 70, 80, or 90 ft, depending on age group.

How big is the warning track on a baseball field?

15 ft wide or greater for high school, college, and the MLB.

What are the dimensions of the batter's box on a baseball field?

For MLB, NCAA, and NFHS, the batter's box is 4 feet wide by 6 feet long. For youth leagues, the batter's box is 3 feet wide by 6 feet long. For all leagues, the inside line sits 6 inches from the edge of home plate, and the front line aligns with the forward point of home plate.