The below graphs are taken from a recent (June 2019) report by Knight Frank on "prime" residential pricing across the world. They define "prime" as generally being the top 5% of each market by value. What these graphs show are the spread between the average price of a prime property and the top price achieved in that market.

The most expensive market is Hong Kong. The average price of a prime property in 2018 was USD 4,251 per square foot (or USD 45,760 per square meter) and the top price achieved was in 2016 at USD 28,154 per square foot (or USD 303,051 per square meter).

Using the 2018 average, a 350 square foot studio apartment would run nearly USD 1.5 million (or almost CAD 2 million), assuming there are "prime" studios available in the market. Remember, we are talking about the top end of the market.

If you'd like to download a copy of the full report, you can do that over here.