USSSA Baseball 13U bat rules (2027)
The rule for 2027
Bats must carry the USSSA 1.15 or BBCOR stamp, or be wood. Drop -8 or heavier.
Source: cabaseball.usssa.com · checked Oct 23, 2026
Varies by event. Bat rules here can change by state, event or league. Check your event's or league's rules before you buy.
| Stamp | USSSA 1.15 or BBCOR or Wood |
|---|---|
| Max barrel | — |
| Max length | — |
| Drop limit | -8 or heavier |
| Ages | 13 |
The national rule is no lighter than -8. Some states (e.g. Georgia and Florida) and the 13 Majors Elite World Series cap it at -5. Check your state and event.
What the stamps mean
- USSSA 1.15 BPF mark: The travel-ball standard, marked "1.15 BPF" by a licensed maker. These bats aren't legal in Little League, Cal Ripken, PONY or Diamond Youth (Dixie). Retailers list barrels up to 2 3/4". Official list.
- BBCOR .50 mark: The high school and college standard: -3 drop, barrel up to 2 5/8", 36" max. BBCOR bats made before USA BBCOR stay legal in high school indefinitely, but the NCAA requires the new USA BBCOR mark from Jan 1, 2029. Official list.
- one-piece solid wood: One-piece solid wood is legal almost everywhere without a stamp. Multi-piece, laminated, bamboo and composite-wood bats usually do need a certification mark.
What size bat for 13U?
Height and weight matter more than age. These are typical sizes for an average-size player, from the Rawlings/Easton sizing chart and CDC growth charts. For your player's exact size, use the Bat Finder for 13U.
| Age | Typical length | USSSA 1.15 drop | BBCOR drop |
|---|---|---|---|
| 13 | 30"–31" | -8 or -5 | -3 |
Shop bats for 13U
These links open bats with the right stamp. Check the exact model against the official list before you buy. We earn a commission if you buy, at no cost to you.
USSSA 1.15 bats
BBCOR bats
Playing college ball in 2029 or later? Those players will need the new USA BBCOR mark, which reaches stores July 1, 2027.
Other USSSA Baseball divisions
- 7U–12U (Ages 6–12)
- 14U (Age 14)
- 15U and up (Ages 15–18)
This page summarizes the published rule. Your league or tournament can add its own, and its ruling is final. Confirm your bat isn't on a decertified or non-approved list before you buy. More bat questions.
Not sure what to buy?
The free Bat Finder gives you the length, the drop and the stamp your league requires in about 20 seconds.
Open the Bat Finder