Only rules for the Dutch leagues are published here:
| League | Specifications | Ball |
| Bee-Ball Rookie League | 8-inch Leather Safety Ball (soft) | Covee/Diamond CD-BEE |
| Bee-Ball Major League | 8,5-inch Leather Safety Ball (soft) | Covee/Diamond CD-850 |
| Pupillen 1e/2e Klasse | 9-inch Leather Game Ball (hard) | Covee/Diamond CD-50 |
| Pupillen 3e Klasse | 9-inch Leather Safety Ball (soft) | Covee/Diamond CD-SFT-9 |
