PB Sports stocks all the popular sizes of CO2 tanks for paintball. If the tank is to be used with a smaller person, you may want to try one of the 9 oz or 12 oz tanks, so that the complete gun setup does not get too heavy. If you are not as concerned with weight, try one of the 20 oz or 24 oz tanks, as you will get more shots out of those tanks before they are empty.
The 20 oz CO2 paintball tank is the most popular size sold in our retail store.