How do you search caches by Size "Not Chosen" or "None"?

Question

This may be a basic one, but I cannot find a way to search for caches by Size "Not Chosen" or "None".  When searching in the Geocaching website you have to search by All, or Micro, Small, Regular, Large, or Other.  I don't want any of those and want to search specifically for caches where the size was not chosen (which there does exist a difference).  I'm working on a Fizzy challenge for that specific designation (or lack thereof).  Thanks.

Answer 1

On Project-GC, the cache size "Not Chosen" can be selected just like any other cache size. For a fizzy, you would would do something like this: https://project-gc.com/Tools/MapMatrix?profile_name=pinkunicorn&country=Sweden&dt_size%5B%5D=Not+chosen&submit=Filter (D/T combos I have not found with the size Not Chosen, all suggestions in Sweden - adjust filters as needed).