What is wrong with choosing the maximum number of flags possible right at the beginning and sticking with it instead of selecting something, then having to change it every month or two?  Just because the option exists to set a maximum number of flags that is below the 248 flags that is theoretically possible does not mean it is intelligent to use it!  The image just grows as more and more flags are accumulated.  Is there a misconception out there that choosing 248 flags and having only 10 shows a lot of white space on the widget?  Well, let me tell you, it is just a misconception, the widget does not have any whitespace, it is always just big enough to accommodate the number of flags you have actually collected.