PhoneArena reports that the update weighs a solid 804.8 MB when downloaded with OTA.
European users are reporting that their HTC One handsets are being updated over the air with Android 5.0.2 as we speak, too. The ROM version appears to be 7.19.401.2, and it is quite hefty at 804.8 MB of update flesh
The HTC One (M7) arrived in 2013 with a 4.7-inch 1080p display, Snapdragon 600 chipset, 4MP UltraPixel camera and a 2,300mAh battery. The handset was launched with Android 4.1 Jelly Bean OS.