By far the most common paintball size used is .68 caliber. This size is widely accepted and used in most paintball fields and tournaments around the world. However, there are also other sizes available such as .50 caliber and .43 caliber, but they are less common in comparison to .68 caliber.

How long 100 paintballs will last depends on various factors such as the rate of fire, the size of the playing area, and your style of play. On average new players, in a typical game, 100 paintballs might last anywhere from 2 to 10 minutes. If you’re conservative with your shots and strategically choose when to engage, you can make them last longer. However, if you’re in the thick of the action, firing rapidly, they might deplete much quicker.