Standard Baseball Bat Dimensions and Weights (with Drawings)

13 Baseball Bats

Baseball bats are metal or wooden clubs that are used to hit balls in a game of baseball. Back in the day, baseballs could have been made into any design, but the development of professional leagues has resulted in baseball bats having a uniform design.

While baseball bats may come in a wide range of sizes due to differences in league rules, baseball bats that adhere to the Major League Baseball (MLB) rulebook measure up to 42 inches long and have a 2.61-inch diameter at their widest point.

In this guide, I’ll briefly cover the differences between league standards in terms of baseball bat dimensions, as well as describe the anatomy of a baseball bat and how to choose the right bat based on the user.

Standard baseball bat dimensions

Standard Baseball Bat Dimensions

Standard Baseball Bat Dimensions

Baseball bat standards vary from league to league.

For instance, according to Little League rules, the Minor and Major divisions cannot exceed 33 inches in length and 2-5/8 inches in diameter at its widest point. However, if the bat is made of wood, it must be at least 15/16 of an inch in diameter or at least 7/8 of an inch in diameter if the bat is shorter than 30 inches.

As for tee-ball, a league for children under six years old, the baseball bat can measure 26 inches at most. There is no regulation regarding the bat’s thickness.

The standard for baseball bats, according to the MLB rulebook, is that they cannot be longer than 42 inches long and 2.61 inches in diameter at their widest point. In addition, if wooden, the bat must be made out of one solid piece of wood, and the handle may not exceed 18 inches in length.

So, whether you want to purchase a brand-new baseball bat or to lathe your own from a block of wood, I would suggest looking at baseball standards based on a specific league before settling on a particular dimension.

Baseball Bat Materials

Baseball bats are typically made from one of two materials: wood and metal alloy (usually aluminum). Little League organizers may permit the use of aluminum bats, but based on the MLB rulebook, all bats used for gameplay must be made of solid wood.

Baseball Bat Weight

Baseball Bat Weight

The MLB does not impose a minimum or maximum weight limit. As long as the bat fits within the allowed dimensions, it is fair game.

An “illegal” bat is any bat that does not conform to a certain league’s rulebook. For instance, a baseball bat measuring 50 inches long would not be allowed in the MLB. In addition, any tampering with the bat—e.g., reducing the bat’s weight, adding pine tar to the baseball bat’s barrel—would be illegal and possibly lead to an ejection.

Professional baseball players are more prone to adopt lighter baseball bats than heftier ones. Most bats used in professional games will weigh 32 or 32 ounces, though some players may stick with a heavier one.

For instance, Babe Ruth favored a 36-inch-long bat that weighed 38 ounces during the later stages of his professional career. Then there was Edd Roush, a player from the 1910s, who wielded a 48-ounce monster of a baseball bat.

Baseball Bat Anatomy

Baseball Bat Anatomy

Before buying or building a baseball bat, let’s first discuss the baseball bat’s anatomy.

Every baseball bat can be divided into five parts or regions, namely:

Knob – The bottom-most portion that keeps the player’s hands from slipping off the bat when swinging.

Grip/Handle – The portion of the baseball bat directly above the knob that the player holds with both hands.

Taper – The portion above the handle that is identifiable by a gradual increase in girth.

Barrel – The thickest part of the baseball bat that is used to hit the baseball. In metal alloy bats, the entire barrel is hollow.

End/Endcap – The upper-most portion of the baseball bat that has a slightly rounded end. In metal alloy bats, the rounded end is referred to as an endcap, which serves as a “lid” for the hollow barrel.

Choosing/Building the Right Baseball Bat

Choosing/Building the Right Baseball Bat

There are three ways to determine the most appropriate baseball bat length based on the user’s height and arm length.

  1. Position the knob of the baseball bat in the center of the player’s chest while pointing the end or endcap to the side. If the player can outstretch their arm and touch the end or endcap with their fingertips, the bat is the right size.
  2. Place the knob of the baseball bat in the center of the player’s chest while pointing the bat forward. If the player can grab onto the portion of the barrel directly after the taper with an outstretched arm, the bat is the right size.
  3. Place the end or endcap of the baseball bat onto the ground while keeping it upright. If the knob of the baseball bat can rest against the player’s open palm, the bat is the right size.

Alternatively, you can refer to a baseball bat size chart to look for the ideal baseball bat size based on the player’s age.

In addition to knowing the baseball bat’s dimensions, you should also pay attention to whether or not the baseball bat’s weight will suit the player. A simple way to test for the appropriate weight is to have the player hold onto the baseball bat’s handle and hold it with an outstretched arm to the side.

If the player can keep the baseball bat perpendicular to their body for at least 30 seconds without fatigue, the bat is the right weight. In the end, the ideal weight of a baseball bat ultimately depends on the user.


And with this, I conclude my brief guide on baseball bat dimensions. As you can see, different leagues have different rules in place regarding the size of the baseball bat. To refresh your memory, the MLB dictates that a baseball bat cannot be longer than 42 inches and measure more than 2.61 inches in diameter at its widest point.

If you found this information useful, please make sure you let your friends know by sharing this article with them. Also, I’d love to hear about what baseball bat size works best for you in the comments section below.


Baron Cooke has been writing and editing for 7 years. He grew up with an aptitude for geometry, statistics, and dimensions. He has a BA in construction management and also has studied civil infrastructure, engineering, and measurements. He is the head writer of

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