On each of our product pages we list the most current sizes each plant is available in. Our industry uses gallons ( and in smaller containers, inches) as the preffered method of measurement. Please be aware that these measurements are not exact by any means but are used as a general suggestion of container sizes. Each manufacturer of containers uses a slightly different volume when they create their pots and then applies the commonly used gallon size which is closest (ie.,1 gallon, 5 gallon, etc). If you need, or are expecting, an size please reach out to us here and we will be happy to get the exact volume for a particular plant and a photo for you.