Little League Field Dimensions

Little League field dimensions by division

Little League International publishes field specifications for each of its baseball and softball divisions. The baseball figures below are the ones most leagues work from; always confirm against the current rulebook at littleleague.org before laying out a new field.

Little League infield layout in detail

The 60-foot diamond is a square measured from the back point of home plate to the back corner of first and third base, and from the back point of home to the center of second base. Because second base sits entirely inside the square, the distance from home to second is not simply 60 times the square root of two; the rulebook figure of 84 feet 10.25 inches accounts for base placement.

Other infield details for the Major Division:

• Pitcher’s plate. 24 inches by 6 inches, its front edge 46 feet from the back point of home plate.
• Mound height. 6 inches above the level of home plate, on a circle 10 feet in diameter. Full-size fields use a 10-inch mound.
• Batter’s boxes. 3 feet by 6 feet, 4 inches from the plate on each side, smaller than the 4 by 6 foot boxes on a full-size field.
• Infield arc. The edge of the skinned infield is an arc of 50 feet radius measured from the front center of the pitcher’s plate.

How a Little League field layout is measured

Laying out a 60-foot diamond is straightforward with two long tapes and a few stakes. The sequence below is the standard approach used by groundskeepers.

1. Set home plateDecide where home plate goes relative to the backstop (at least 25 feet) and the sun; the traditional orientation points the line from home through second base roughly east-northeast so the batter is not looking into the setting sun.
2. Locate second baseRun a tape from the back point of home plate 84 feet 10.25 inches along the intended centerline and stake the center of second base.
3. Find first and thirdHook one tape at home and one at second. Where the 60-foot mark on the home tape meets the 60-foot mark on the second-base tape is the back corner of first base; repeat on the other side for third.
4. Set the pitcher’s plate, arc and foul linesMeasure 46 feet from the back point of home to the front edge of the rubber, then swing a 50-foot radius from the front of the pitcher’s plate for the grass line. Extend the foul lines from home through the outside edges of first and third to the fence.

Pro tip: Measure from the back point of home plate, not the front. Every rulebook distance on a baseball field originates at that apex, and starting from the front edge throws every other measurement off by about 8.5 inches.

Building a youth field that survives the season

Little League field size is small, which concentrates wear. The same batter’s boxes, pitching area, base cutouts and first-base running lane take every footstep from every game, and a busy complex may host practices and games six or seven days a week from spring through summer. Natural grass infields on this schedule develop bare lips at the grass edge, lose their crown, and hold water in the low spots after rain, cancelling games.

Three things make a youth field durable. First, grading: a crown of roughly half a percent from the pitcher’s mound out to the grass edges moves water off the skinned infield instead of letting it pool. Second, infield mix: a balanced blend of sand, silt and clay that firms up without turning to concrete or soup; see our page on turf baseball fields for how synthetic infields remove that variable altogether. Third, edge management: the lip where skinned infield meets grass must be raked back regularly or it builds into a ridge that produces bad hops.

Synthetic turf is increasingly common on youth infields, batting tunnels, bullpens and the high-wear halo around home plate for exactly these reasons. A turf infield drains in minutes, has no lip, needs no dragging and plays the same on the last day of the season as the first. The key to a turf field that performs is the base: laser-graded aggregate, compacted in lifts, with the crown and drainage built into the stone rather than hoped for. That is the same base discipline that goes into a high school football field or any other playing surface, and it is where experienced field installers earn their reputation.

Planning a new or renovated Little League field

Shared diamonds often use movable pitching rubbers and portable mounds to serve both 46-foot and 50-foot divisions; fences are fixed, so hosting both usually means a temporary outfield fence. If your league is weighing a synthetic infield or a full turf field, the base construction and drainage design are what to evaluate first, before turf products. The professional turf installation crews we work with on athletic fields are chosen for that groundwork.