Montenegro has a population of about 628,000 people, which is almost the same as Luxembourg's.
Iceland has a population of about 364,000 people, which is slightly lower than Luxembourg's.
Andorra has a population of about 77,000 people, which is much lower than Luxembourg's, but still within the range of small Western European countries.
Cyprus has a population of about 1.2 million people, which is higher than Luxembourg's, but still relatively small compared to other Western European countries.
Monaco has a population of about 39,000 people, which is slightly higher than Liechtenstein's, and also a small landlocked country in Western Europe.