Tina's Daylilies sells double fans which is industry standard. Often it is more than a double fan, but a double fan is the smallest we sell. As you can see in the pictures on the right fans vary in size. The fan on the left is much smaller than the fan on the right. If you look at the fan base just above the roots and the roots themselves you can see that the fan on the right is bigger. Therefore you will need more room for that plant than the one on the left.