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Current IESA Baseball Bat Standards

Any non-wood bat that has a barrel diameter greater than 2 5/8 inches is illegal. All non-wood bats must meet the following NFHS standards: a maximum barrel diameter of 2 5/8 inches; maximum length of 36 inches, a Ball Exit Speed Ratio (BESR) silkscreen label on the bat; and in weight, the bat shall not weigh, numerically, more than three ounces less than the length of the bat (e.g., a 31-inch-long bat cannot be less than 28 ounces).

Non-wood bats 30 inches and under in length which have a greater than three ounce weight vs. length differential may be used provided the barrel diameter does not exceed 2 1/4 inches (e.g., a 29-inch-long bat may weigh 20 ounces and is legal provided the barrel diameter does not exceed 2 1/4 inches). The BESR label is not required on this type of bat.

Wood bats that are manufactured in accordance with National Federation rules may be used.

Note: Effective January 1, 2006 no BESR label, sticker or decal will be permitted on any non-wood bat. All non-wood bats that require the BESR performance standard shall be labeled with a completely visible silkscreen or permanent certification mark. [1-3-2; 1-3-4]

The following are examples of legal and illegal non-wood bats:

Legal and Illegal Non-Wood Bats
Length Weight Barrel Diameter Status
31 28 2-5/8"
30 20 2-3/4" Illegal—Max. barrel diameter for all non-wood bats is 2-5/8"
Would be legal if barrel diameter did not exceed 2-1/4"
30 20 2-1/4"
32 29 2-5/8"
31 25 2-1/4" Illegal—All 31" and over bats must meet NFHS standards
28 19 2-1/4"
31 28 2-3/4" Illegal—Maximum barrel diameter for a non-wood bat is 2 5/8"
30 19 2-1/4"
29 26 2-5/8"
32 22 2-1/4" Illegal—All 31" and over bats must meet NFHS standards
30 27 2-5/8"

Note: Effective January 1, 2012. The bat which may be a wood or non-wood product, shall be a smooth cylinder implement from the top of the cap to the top of the knob. The cap of the bat and knob of the bat shall be permanently and securely fastened. All non-wood bats shall meet the Batted Ball Coefficient of Restitution (BBCOR) performance standard, and such bats shall be labeled with a silk screen or other permanent certification mark. The certification mark has to be rectangular, a minimum of a half-inch on each side and located on the barrel of the bat in any contrasting color. There shall be no devices, attachments or wrappings that cause the handle to become flush with the knob. Molded grips are illegal.



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