Back in 2016 our poll showed that people preferred screens between 5" and 5.3". Then in 2017, 5.2" was elected best although larger sizes were already gaining popularity. Now? Now people want larger screen - 6" is the new favorite. Naturally, back then we were mostly talking about 16:9 screens and now the 18:9 aspect ratio is more common. As a reminder, a 6" 18:9 screen is equivalent to a 5.5" 16:9 screen (same width, but taller). A quick calculation shows that a 6" 18:9 screen has about 25% more surface area than a 5.2" 16:9 screen. That number drops to around 18% if we go for a...
Source: https://www.gsmarena.com/weekly_poll_results_6_is_the_new_52-news-35026.php