Official Little League Apparel & Equipment Sizing Guide
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Finding the right fit for your player’s baseball or softball season shouldn’t be a guessing game. Use our official manufacturer sizing guide below to ensure your player gets the perfectly sized jersey, pants, and safety equipment during registration.
Baseball Jerseys (Youth & Adult)
| Size Tag | Chest / Bust | Body Length | Approximate Age / Weight |
|---|---|---|---|
| Youth Small (YS) | 26" – 28" | 20" | Ages 5–7 (40–55 lbs) |
| Youth Medium (YM) | 28" – 30" | 22" | Ages 8–10 (55–75 lbs) |
| Youth Large (YL) | 30" – 32" | 24" | Ages 10–12 (75–95 lbs) |
| Youth XL (YXL) | 32" – 34" | 26" | Ages 12–13 (95–115 lbs) |
| Adult Small (AS) | 34" – 36" | 28" | Adult Chest 34–36" |
| Adult Medium (AM) | 38" – 40" | 29" | Adult Chest 38–40" |
| Adult Large (AL) | 42" – 44" | 30" | Adult Chest 42–44" |
| Adult XL (AXL) | 46" – 48" | 31" | Adult Chest 46–48" |
Girls’ & Women’s Softball Jerseys
Softball jerseys feature an athletic tailored cut for flexibility and comfort during fastpitch play.
| Size Tag | Bust Range | Waist Range | Recommended Size |
|---|---|---|---|
| Youth Small (YS) | 25" – 27" | 22" – 24" | Youth 6–8 |
| Youth Medium (YM) | 27" – 29" | 24" – 26" | Youth 8–10 |
| Youth Large (YL) | 29" – 31" | 26" – 28" | Youth 10–12 |
| Adult Small (AS) | 32" – 34" | 26" – 28" | Women's 2–4 |
| Adult Medium (AM) | 35" – 37" | 29" – 31" | Women's 6–8 |
| Adult Large (AL) | 38" – 40" | 32" – 34" | Women's 10–12 |
Baseball & Softball Pants
- Waist: Measure at the natural waistline where the belt is worn.
- Inseam: Measured from the crotch down to the bottom hem.
| Size Tag | Waist Range | Open-Bottom Inseam | Elastic Knicker Inseam |
|---|---|---|---|
| Youth Small (YS) | 20" – 22" | 22" | 12" |
| Youth Medium (YM) | 24" – 26" | 24" | 14" |
| Youth Large (YL) | 28" – 30" | 26" | 16" |
| Adult Small (AS) | 28" – 30" | 31" | 18" |
| Adult Medium (AM) | 32" – 34" | 32" | 18" |
| Adult Large (AL) | 36" – 38" | 33" | 19" |
Batting Helmet Sizing
To find helmet size, wrap a soft cloth measuring tape around the player's head about 1 inch above the eyebrows.
Pro Tip for Measuring Chest: Measure around the fullest part of your player's chest under their arms, keeping the tape horizontal and comfortably loose.
- Junior / Tee-Ball: Fits Head Circumference 18.5" – 20.5" (Hat Size 6 1/4 – 6 1/2)
- Youth Standard: Fits Head Circumference 20.5" – 22.0" (Hat Size 6 1/2 – 7.0)
- Senior / Adult: Fits Head Circumference 22.0" – 24.5" (Hat Size 7.0 – 7 3/4)
Need Help or Sizing Exchanges?
If you're between sizes, we recommend ordering one size up to account for undergarments and growth during the season. For registration support or sizing questions, reach out to our Equipment Manager through the contact page.