Determining the "middle smallest" country requires ordering all countries by size and then identifying the country in the middle of that ordered list. Unfortunately, a definitive, universally agreed-upon list of countries ranked by size is not readily available, and the concept of "middle" is ambiguous without a complete, ranked dataset. The provided references list only a small selection of small countries, insufficient for determining a "middle" value.
However, we can analyze the provided data to illustrate the process. Based on the provided sizes:
- Vatican City: 0.27 Square Miles
- Monaco: 0.77 Square Miles
- Nauru: 8.5 Square Miles
- Tuvalu: 10 Square Miles
- San Marino: 24 Square Miles
- Liechtenstein: 62 Square Miles
- Marshall Islands: 70 Square Miles
From this subset, Nauru (8.5 square miles) might be considered to be near the middle based on size alone. But this is an extremely limited sample. To accurately answer the question, a comprehensive list of all countries ranked by area is needed.
Therefore, a more precise and answerable question would be: "Which country is closest to the median land area among the smallest countries in the world?" This question requires a dataset far beyond what has been provided.