Softball Bat Size Chart: How to Size a Fastpitch Bat by Age, Height, and Weight

If you have shopped for a baseball bat before, the first thing to know about fastpitch is that the numbers run lighter. A 14-year-old baseball player might be swinging a -5, while a 14-year-old fastpitch player is often still in a -10. That is not a mistake, and it is not because softball players are weaker. Fastpitch swings are faster and more rotational, and the pitch comes in on a rise-and-drop plane that rewards bat speed over mass. Lighter bats fit that, which is why softball drops of -10 to -13 stay common well into the teenage years.

This guide gives you a full fastpitch softball bat size chart by age, height, and weight, two quick ways to check the fit at home, and a clear explanation of softball's own drop weights and certifications, which are different from baseball. If you would rather skip the charts, our free softball bat size calculator does the math in a few seconds.

Quick answer: A fastpitch bat's length comes from height (roughly a 28-inch bat around 4'6", 30 inches around 5 feet, 32 to 33 inches at 5'6" and up). The drop comes from age and strength: -12 to -13 for ages 5 to 9, -11 to -12 for ages 10 to 12, -10 to -11 for ages 13 to 14, and -8 to -10 in high school. Confirm the length with the hip test below.

Length and Drop: The Two Levers

Every fastpitch bat is defined by two numbers. Length (knob to barrel end, in inches) sets plate coverage and swing arc. Too short and she cannot reach the outside pitch; too long and the barrel shows up late. Drop weight (length in inches minus weight in ounces, written as a negative) sets how heavy the bat feels. A 30-inch bat at 19 ounces is a -11. Bigger number, lighter bat.

The order matters: pull length from height, then pull drop from age and strength. Because fastpitch rewards bat speed, err lighter on the drop than you would for a baseball player the same size.

Two Quick Fit Checks

Before you trust any chart, put a bat in her hands and run these two checks.

The hip test. Rest the bat on the ground, barrel down, alongside her leg. The knob should land between the top of the hip bone and the middle of the thigh. If it climbs toward her belt, the bat is too long.

The reach test. Have her hold the knob against the middle of her chest and point the barrel straight out to the side. If she can stretch out and just grab the end cap, the length works.

Pass both, match the chart below, and you have your length. Now find the drop.

Fastpitch Softball Bat Size Charts by Age, Height, and Weight

Find the player's height on the left, then move across to her weight range. Each cell shows a recommended length and drop weight.

Ages 5-7 (Beginner / Coach Pitch)

Height	36-45 lbs	46-55 lbs	56-65 lbs	66-75 lbs
3'5" - 3'8"	24" / -13	25" / -12	25" / -12	26" / -12
3'9" - 4'0"	25" / -13	26" / -12	26" / -12	27" / -11
4'1" - 4'4"	26" / -12	27" / -12	27" / -11	28" / -11

Ages 8-9

Height	50-59 lbs	60-69 lbs	70-79 lbs	80-89 lbs	90-99 lbs
4'0" - 4'3"	27" / -12	27" / -12	28" / -11	28" / -11	29" / -11
4'4" - 4'6"	27" / -12	28" / -11	28" / -11	29" / -11	29" / -10
4'7" - 4'9"	28" / -11	28" / -11	29" / -11	29" / -10	30" / -10

Ages 10-12

Height	60-69 lbs	70-79 lbs	80-89 lbs	90-99 lbs	100+ lbs
4'6" - 4'8"	28" / -12	29" / -11	29" / -11	30" / -11	30" / -10
4'9" - 5'0"	29" / -11	29" / -11	30" / -11	30" / -10	31" / -10
5'1" - 5'3"	30" / -11	30" / -10	31" / -10	31" / -10	31" / -9

Ages 13-14

Height	90-109 lbs	110-129 lbs	130-149 lbs	150+ lbs
5'0" - 5'3"	30" / -11	31" / -10	31" / -10	32" / -9
5'4" - 5'7"	31" / -11	31" / -10	32" / -10	32" / -9
5'8"+	32" / -10	32" / -10	33" / -9	33" / -9

Ages 15+ (High School)

Height	110-129 lbs	130-149 lbs	150-169 lbs	170+ lbs
5'2" - 5'5"	32" / -10	32" / -9	32" / -9	33" / -8
5'6" - 5'9"	33" / -10	33" / -9	33" / -9	33" / -8
5'10"+	33" / -9	34" / -9	34" / -8	34" / -8

Drop Weight by Age

Softball drops trend lighter than baseball, and they get a little heavier (lower drop) as a player gets stronger:

• Ages 5-9: -12 to -13. Keep it light so she can swing fast and learn good mechanics.
• Ages 10-12: -11 to -12. A touch more mass without losing bat speed.
• Ages 13-14: -10 to -11. The transition years.
• Ages 15+ (high school): -8 to -10, depending on strength.

The biggest mistake parents make is sizing up too early, in length or drop, so a player can "grow into" the bat. Do not do it. A bat that is too much right now slows the swing and teaches bad habits. Buy for the hitter you have today and re-check every season.

Softball Certifications (Not the Same as Baseball)

This is the part families miss most: a baseball bat is not legal in softball, and a softball bat is not legal in baseball. Softball has its own certification system, and your league's stamp requirement rules everything:

• USA Softball (formerly ASA): The most common standard, required by many rec and travel leagues and by high school (NFHS) fastpitch.
• USSSA: Required by most USSSA-sanctioned travel tournaments; USSSA softball bats carry their own stamp.
• NSA and ISA: Used by some leagues and tournaments.

Because requirements vary, many fastpitch players own more than one bat across a season. Always check the rulebook and match the stamp before you buy. Once you know the certification and size, dial in the swing with the right approach to exit velocity.

Put It Together

Sizing a fastpitch bat is simple once you separate the two numbers. Get length from height and confirm it with the hip and arm-reach tests. Get drop from age and strength, leaning light so she can swing fast. Match the certification to your league. And re-measure every season, because players grow faster than bats wear out.

When you are ready, let the softball bat size calculator do the lookup for you.

FAQ

Q: My player is between two lengths on the chart. Which do I pick? A: Go shorter. A slightly shorter bat is easier to control and keeps bat speed up, and control beats reach for almost every youth hitter. You can move up next season.

Q: Can a softball player use a baseball bat? A: No. They are built differently and certified under separate systems. A baseball bat is not legal in softball play, so always buy a bat made and stamped for fastpitch softball.

Q: How often should I re-check bat size? A: Every season, and after any growth spurt. A bat that fit last spring can be too short by fall.