GeoBounds

GeoBounds[g] gives the ranges of latitudes and longitudes in the geo region g.

GeoBounds[g, δ] pads ranges of latitudes and longitudes by ±δ.

GeoBounds[g, Scaled[s]] pads range of latitudes and longitudes by a scaled amount s.

Examples

Get bounds of a country:

GeoBounds[Entity["Country", "France"]]
(* {{41.3, 51.1}, {-5.14, 9.56}} *)

Pad the bounds:

GeoBounds[Entity["Country", "France"], Quantity[1, "Degrees"]]

Please visit the official Wolfram Language Reference for more details.