Check the listing for details. Ball Sizer Guide Blue. Color: Blue, Condition: New, Made in Taiwan. Listed at 31.97 USD. Ball Sizer Guide The Ball sizer is a multipurpose tool for players of all levels. With 9 ball sizing gauges, you will be able to match your paint size to your barrel bore size for optimal accuracy. FeaturesMachined Aluminum Paintball Sizer 9 Ball Sizing Gauges With Laser Engraved Sizes Carabiner Bottle Opener Tank Extender Wrench Tape Cutting Edge.