Truly tiny flagships may never return, but over the last couple of months a couple of relatively small models did appear. The latest is the Asus Zenfone 8, which has a 5.9” display with 20:9 aspect ratio and a punch hole selfie camera. Its dimensions are 148x68.5x8.9mm, that’s as small as Android flagships get at the moment. And it’s down to the basic design choices made by Asus, which contrast with Sony’s choices for the Xperia 5 III – a 6.1” display with a taller 21:9 aspect ratio and classic bezels (with camera and all, making them thicker). That makes the phone 157x68x8.2mm in size....
Source: https://www.gsmarena.com/weekly_poll_is_the_asus_zenfone_8_the_small_phone_for_you_or_would_you_like_a_zenfone_8_flip-news-49096.php