There are at least two other caches (that I know of) that lay claim to being the “Smallest" cache.
The Smallest Cache in the World
Sign Here - The World’s Smallest Cache
Well, after looking at their descriptions, I feel our cache has them beat, as this cache is actually smaller then one of them and the other cache that is smaller does not have anything inside of it.
Once you find the first part of this multi-stage cache, your journey is only half over. The next cache is bigger, but it is EXTREMELY well camouflaged and will likely be much harder to find. Some people may want to call the second cache the "The World's Hardest Cache". It will give some Geocachers a run for their money. However, if you think like a Geocacher, you should be able to find without too much effort. The coordinates to the second cache are on a very small neon-green piece of paper that is laminated. Please make sure to put this paper back the way you found it.
Final Note: During Little League Season (about mid March through the end of June), the first part of the cache will be difficult to access during during the late afternoon and all day on Saturday. During these months, I suggest you go after this cache on a Sunday, go really early in the morning or wait until after dark.