The casing of the HTC 10 is made of an aluminum unibody. Although at a first glance it looks quite bulky, it also looks high-quality. The manufacturer states a height of nine millimeters (~0.34 in). We measured 9.2 millimeters (~0.36 in), and even 10.15 millimeters (~0.4 in) including the camera. The device is available in three colors: Carbon Gray, Glacier Silver and Topaz Gold.

Despite its comparatively large casing, the HTC 10 is pleasant to hold. With the polished edges it resembles a thick Huawei Mate S, but also has its own unique charm.

The stability is very good. Pressure did not make any impression on the smartphone. Even high pressure on the front's glass did not cause any wave formations on the LC display. The gaps are also accurate and crisp. We could not find any reason for complaint here. The card slots are separated; while the micro-SD card can be inserted on the left, the nano-SIM slot is situated on the right.