Bat Sizing

Bat Sizing*

Success at the plate often comes down to this: making consistent hard contact against live pitching. To do this, it’s important to swing the right bat for you. That means a bat that’s long enough to cover the strike zone, light enough to swing with ease, heavy enough to generate power, and, of course, permitted in your league. In order to find the ideal size for you, consider the following guidelines:

3'-3'4" 91.44cm‑101.6cm 3'5"-3'8" 104.14cm‑111.76cm 3'9"-4' 114.3cm‑121.92cm 4'1"-4'4" 124.46cm‑132.08cm 4'5"-4'8" 134.62cm‑142.24cm 4'9"-5' 144.78cm‑152.4cm 5'1"-5'4" 154.94cm‑162.56cm 5'5"-5'8" 165.1cm‑162.56cm 5'9"-6' 175.26cm‑182.88cm 6'1"-Over 185.42cm‑Over
Under 60 Lbs. Under 27.22 Kg.26" 66.04cm27" 68.58cm28" 71.12cm29" 73.66cm29" 73.66cm     
61 - 70 27.67kg-31.75kg27" 68.58cm27" 68.58cm28" 71.12cm29" 73.66cm30" 76.2cm30" 76.2cm    
71 - 80 32.21kg-36.29kg 28" 71.12cm28" 71.12cm29" 73.66cm30" 76.2cm30" 76.2cm31" 78.74cm   
81 - 90 36.74kg-40.82kg 28" 71.12cm29" 73.66cm29" 73.66cm30" 76.2cm30" 76.2cm31" 78.74cm32" 81.28  
91 - 100 41.28kg-45.36kg 28" 71.12cm29" 73.66cm30" 76.2cm30" 76.2cm31" 78.74cm31" 78.74cm32" 81.28cm  
101 - 110 45.81kg-49.90kg 29" 73.66cm29" 73.66cm30" 76.2cm30" 76.2cm31" 78.74cm31" 78.74cm32" 81.28cm  
111 - 120 50.35kg-54.43kg 29" 73.66cm29" 73.66cm30" 76.2cm30" 76.2cm31" 78.74cm31" 78.74cm32" 81.28cm  
121 - 130 54.88kg-59.00kg 29" 73.66cm30" 76.2cm30" 76.2cm30" 76.2cm31" 78.74cm32" 81.28cm33" 83.82cm33" 83.82cm 
131 - 140 59.42kg-63.50kg 29" 73.66cm30" 76.2cm30" 76.2cm31" 78.74cm31" 78.74cm32" 81.28cm33" 83.82cm33" 83.82cm 
141 - 150 63.96kg-68.04kg  30" 76.2cm30" 76.2cm31" 78.74cm31" 78.74cm32" 81.28cm33" 83.82cm33" 83.82cm 
151 - 160 68.49kg-72.57kg  30" 76.2cm31" 78.74cm31" 78.74cm32" 81.28cm32" 81.28cm33" 83.82cm33" 83.82cm33" 83.82cm
161 - 170 73.03kg-77.11kg   31" 78.74cm31" 78.74cm32" 81.28cm32" 81.28cm33" 83.82cm33" 83.82cm34" 86.36cm
171 - 180 77.56kg-81.65kg     32" 81.28cm33" 83.82cm33" 83.82cm34" 86.36cm34" 86.36cm
Over 180 Over 81,65kg      33" 83.82cm33" 83.82cm34" 86.36cm34" 86.36cm
AGE5 - 78 - 91011 - 1213 - 1415 - 16
LENGTH24" - 26" 60.96cm‑66.04cm26" - 28" 66.04cm‑71.12cm28" - 29" 71.12cm‑73.66cm30" - 31" 76.2cm‑78.74cm31" - 32" 78.74cm‑81.28cm32" - 33" 81.28cm‑83.82cm


Bat length is measured in inches from knob to end cap. A longer bat gives you greater reach, allowing you to hit balls on the outside part of the plate. However, longer bats also tend to have more mass towards the end of the bat that requires more power to swing them. We recommend swinging bats of different lengths to decide what option best suits your swing. The right combination of length and weight will help you reach your peak performance.

Baseball bats most commonly are found between 24-34 inches. Please check the size chart for examples of what length may be appropriate for you.

Many baseball players mistakenly believe a longer bat means more plate coverage, but this is not always true. Since a longer bat often means a heavier feeling bat, a bat that is too long for you can slow down your timing and prevent you from catching up to and hitting inside pitches. Even some Major League players swing bats as short as 32 inches. When choosing your bat length, you should keep plate coverage in mind. You should also consider your swing and stance relative to the plate.


Bat weight is measured in ounces (oz.). A bat’s weight is often tied to its “weight drop” -- its length in inches versus its weight in ounces. For instance, a 30-inch, 20-ounce bat would be referred to as a -10 bat.

bat length (in.) – bat weight (oz.) = weight drop

As a general rule of thumb, the higher the competition or league level (meaning, from youth league up to the pros) the lesser the weight drop. A lesser weight drop means the bat feels heavier. So a -5 bat will feel heavier than a -10 bat.

Selecting the right bat weight depends on three main factors: sport, league rules, and player preference.

  • Leagues have rules identifying which weight drops are permitted for play. Prior to choosing a bat, we recommend finding out if your league has a specific standard for bat weight drops in order for them to be permitted. For more information on league rules, please refer to the Your League section.

  • Players with less experience generally swing lighter bats in order to have better bat control. More experienced players generally swing a heavier bats to help maximize power. A way to tell if a bat is right for you is your swing speed. A bat that is too heavy is harder to swing, causing a loss in momentum, reduced distance or a miss altogether. If a bat is too light for a player, the player could miss out on the extra force they could generate from a heavier bat. A happy medium needs to be found. It is highly recommended you demo a bat against live pitching speeds in order to find the best weight for you.

Most common weight drops in various baseball leagues are -12, -10, -9, -8, -5, and -3. As you progress toward high school baseball, the weight drop lowers (the bats become heavier). When moving to a heavier bat, you may then decide to drop an inch in length to more easily handle the additional weight. This is a matter of personal preference and comfort at the plate as you advance in age, league and skill level.

Shop By Weight Drop

*This is for example purposes only. The best way to find the right size bat for you is to demo the bat, preferably against live pitch speeds.

**Manufacturing tolerances, performance considerations and grip weight may cause variations from the listed weight.


Governing bodies

Governing bodies (for example, the USSSA and USA Baseball) set unique standards for bat performance. Bat manufacturers make bats to meet these standards. Each standard, however, is different. So, bats meeting one standard may not meet another. Bats are marked with logos identifying the standard which they meet.

Leagues adopt the standard they deem appropriate for play under their particular rules. League adoptions vary region by region, so we highly recommend consulting your coach and/or league official to understand the standard adopted by your league prior to purchasing a new bat.

The following information will help you understand in the standard adopted by your league:

Select your governing body or league*:

*Regulations for each league are subject to change. In order to have the most up-to-date information, please contact your coach or league official.

BBCOR Certified logo

College and High School Baseball

  • -3 Drop Weight
  • Barrel Diameter 258” or less


USSSA logo

Senior League Baseball

  • Weight Drop Varies
  • Barrel Diameter Varies


USA Baseball logo
USA Baseball

USABat Standard

  • No Weight Restriction
  • Maximum Barrel Diameter of 258

USA Bats

College and High School Baseball

  • Maximum drop weight of -3
  • Maximum barrel diameter of 258
  • Most wood bats are allowed under BBCOR rules

There are multiple ways to recognize a BBCOR bat. The easiest way is to look for the BBCOR certification stamp on the bat where the handle meets the barrel. Another way to identify a BBCOR DeMarini bat is the blue sticker on the packaging.

BBCOR Certified logo
BBCOR Certified sticker

Wood bats are also legal for BBCOR play and do not need the BBCOR mark. Wood composite bats on the other hand do need the BBCOR mark to be legal for play.

Not all -3 BBCOR bats feel the same. Often, a line of BBCOR bats is made with varying swing weights, from light-swinging to balanced to end-loaded. The swing weight is influenced by how the bat’s weight is distributed. End-loaded bats have more weight toward the end cap, more and have a relatively higher swing weight for that reason. More balanced bats have their weight distributed more evenly and have a relatively lower swing weight for that reason. For more information on end-loaded and balanced bats, please see the Bat Technology section.

USSSA - United States Sports Specialty Association

USSSA (United States Sports Specialty Association) is one of the largest baseball associations in the United States. USSSA separates their regulations by age group, with a range of permitted weight drops and barrel diameters. In order to find the most accurate information about what can be used in your USSSA league, we recommend contacting your coach and/or league official, or checking the USSSA website.

Ways to recognize bats certified for USSSA play include the USSSA logo on the taper of the bat, and the red knob and packaging sticker.

USSSA logo on bat
USSSA sticker

Weight drops vary in Senior League baseball, but players 10 years old and under often use -10 weight drop bat. Players 12 years old and under often use a -8 weight drop, and 13 year old players often use a -5 weight drop.**

**These are recommendations. Check with your coach/league official to find out what your league rules allow.

USA Bats

Effective January 1st, 2018, USA Baseball will adopt a new bat standard for youth baseball bats. All players participating in leagues that have adopted the USA Baseball bat standard will be required to use a USA Baseball-certified bat (a “USABat(s)” Standard). On January 1, only bats that have the USA Baseball mark will be legal for play in these leagues.

USABats will have these marks:

USA Baseball logo on bat
USA Baseball Sticker

The following national member organizations will be adopting the USA Baseball bat standard beginning January 1, 2018:

Pony League Logo
Little League Logo
Dixie Youth Baseball Logo
Cal Ripken Baseball Logo
Babe Ruth League Logo
All American Baseball Center Logo


*In order to have the most up-to-date information or if you have specific questions about your league, please contact your coach and/or league official.

Bat Technology

A bat is more than just a hunk of metal or wood. It is a carefully-engineered tool that allows players to get the most out of every swing. Every component of the bat, from the knob to the end cap, is designed to maximize every ounce of performance. There are four main technical components you need to know for your bat: Material, Construction, Barrel Diameter and Weight Balance.


One of the biggest influences on bat performance is its material. Bats are made of metal, composites, or wood. Metal and composite bats are typically made of composite or alloy material, and are traditionally used for youth baseball through college baseball. Wood, meanwhile, is used throughout the professional levels, as well as for specific amateur and travel ball leagues/organizations. Please read below to learn more about bat materials and how they affect performance.

Composite Vs. Alloy

Non-wood bats are built from either alloy, composite, or a combination of the two.

Composite bat cross section

Composite bats are made with a layered material (often carbon fiber) that is easy to distribute, giving us the ability to make bats with a variety of swing weights, from balanced to end-loaded.

Pros of Composite:

  • Minimize the sting from a mis-hit ball by reducing vibration to the hands

  • Often have a larger sweet spot than alloy bats

Shop Composite Bats

Alloy bat cross section

Alloy is a mixture of two or more metals, and has been commonly used in baseball bats for years.

Pros of Alloy:

  • Stiffer feel through the swing zone

  • More durable material

Shop Alloy Bats

Wood Composite*

These bats differ from other wood bats, since they are multiple combinations of materials -- rather than one natural piece of wood -- with the goal of increased durability with wood-like performance. While wood composites are less susceptible to breakage, they also require league approval for use. So before buying a wood composite bat, make sure it is approved for play in your league.

*Wood bats are more likely to break or crack on mishits than Alloy and Composite bats.

Shop Wood Composite Bats


One-piece bats are one complete piece of composite or alloy and are often used by power hitters, since they provide less flex on contact.

Two-piece bats are comprised of two separate parts: the barrel and the handle. The handle is connected to the barrel through a transition piece in the taper area of the bat. Two-piece construction helps minimize vibration on mis-hit balls. Those bats are preferred by contact hitters, since the two-part construction helps generate maximum swing speed without the fear of major sting on contact.

Barrel Diameter

The barrel is the thickest and widest part of the bat used to hit the ball. The barrel is where you want to hit the ball in order to achieve maximum performance.

Barrels come in different sizes, and are measured by diameter. Barrel diameter is measured in inches and, like weight drop, certain leagues limit the size of a bat’s barrel. Please refer to the Your League on what your league requires. Generally, these are the most common barrel diameters:

  • 34 inches
  • 58 inches
  • 12 inches
  • 14 inches

Swing Weight

A factor you may not see, but will definitely feel is the swing weight* of your bat. Bats are often segmented by their given length and weight. The Swing weight is a determination of how a bat’s particular weight is distributed along the bat’s length. For example, you can have two bats that are 30 ounces, but that have different swing weights because the 30 ounces are distributed differently in the bat. Bats can fall along the swing weight spectrum, from light to balanced to end-loaded.

End-loaded bats shift extra weight toward the end of the barrel, creating more whip-like action on a player’s swing and generating more power.

Balanced bats have a more even weight distribution, allowing for potentially greater swing speed for many hitters. This is preferred by contact hitters who want more control of their swing.

DeMarini bats use different names to identify end-load versus balance. End-loaded bats feature the word “Insane” in the bat name, while balanced bats feature the word “Zen".

*Note - there are a variety of swing weights offered to meet player needs.

Balanced Bat
Endloaded Bat