Choose your length and weight!  Bat weights are determined by a Drop system.  To determine the bats weight, take the bat's length and subtract the bat's Drop rating.  Ex. A 31" drop 8 (-8) bat would weigh 23oz.  (31-8=23).  Generally speaking, 8u through 12u uses Drop 10 (-10) bats.  13u uses drop 8 (-8) bats and 14u uses drop 5 (-5) bats.  High School and above uses BBCOR drop 3 (-3) bats.
 
Some bat length/weight combinations are more readily available and can be received within 2-3 business days.  Others, due to being less common combinations, may take 3-5 days due to coming direct from the manufacturer.  
 
The Marucci CATX bat is the perfect choice for serious players looking to take their game to the next level. Featuring a durable AZR aluminum construction, this Marucci CATX USSSA  baseball bat ensures optimal plate performance and bat responsiveness. The liquid-gel anti-vibration knob featured on this Marucci CATX bat creates a smooth and solid feel at impact, while the micro-perforated soft-touch grip supplies superior comfort at the plate. New barrel profiles provide a huge and consistent sweet spot, while the multi-variable wall design expands the sweet spot with forgiving barrel walls