• exact shows only blocks that are equal to the given size. Used as default value.
• min shows only blocks equal or larger than blocks of given size.
• max shows only blocks equal or smaller than blocks of given size.

It should be kept in mind, that the Bitmask value defines the mask of an address, which means that a smaller size value actually defines a bigger network. So, listing all blocks with size 24 as minimum will create a view of all blocks whose prefix length value is 24 or less. Similarly, listing blocks with size 24 as maximum will create a list if all free blocks with bitmask value that is 24 or more.