When the measurement of the revolver barrel is 2.5 inches or less, it is considered to be a snub nose revolver. There is some debate over this since there’s no definitive answer. Some say that since there is an apparent gap between 3′ and 4′ barrels that anything 3′ and under should be considered a snub nose. I mostly agree with that. Others will say anything 2.5′ and shorter is the snub nose.