Arvīds I think there is a limit of minimum city size
The limit is a minimum population of 100,000 people. If there is no city of that size or bigger in a country then the largest city in the country is allowed to apply.
I don't know how many cities that covers in Latvia, just Riga probably?
In Lithuania it definitely would include Vilnius, Kaunas, and Klaipeda, and maybe Siauliai?