SimOptions does not provide an unlimited data eSIM for Vatican City; every plan listed has a specific data cap. The smallest offer is 20 GB for 15 days, and the largest is 120 GB for 30 days.
Travelers who need a larger amount of data can choose fixed data plans. For example, “My European eSIM 120GB” gives 120 GB for 30 days at $55.90 USD, and “Holiday Europe eSIM” offers 50 GB for 31 days at $38.90 USD. These fixed plans may be more cost‑effective for most users unless a very heavy data consumer requires more connectivity.