Almost all smartphones with an OLED display released in the first half of 2021 had a diagonal of 6 inches or higher, according to UBI Research. More specifically, 6 to 7 inch OLED phones have a 97.5% share in the market, compared to 78% in 2018. That is 119 models out of 122 released in the first six months of 2021. The Asus Zenfone 8 is the only one to go below 6” (just below, it has a 5.9” display), the Sony Xperia 10 III is exactly at 6.0”. On the other end of the scale are the Xiaomi Mi Mix Fold and Huawei Mate X2, which are the only models with 8.0” OLED panels. There were no 7”...
Source: https://www.gsmarena.com/ubi_research_975_of_oled_phones_released_in_h1_2021_had_a_6_to_7_inch_display-news-50044.php