Yes — projector screens, like TVs, are measured diagonally from one corner of the visible screen area to the opposite corner. For example, a 120-inch screen means the diagonal viewable surface is 120 inches, not the width or height.
When shopping, it’s also important to check the aspect ratio (16:9, 4:3, 2.35:1, etc.), because the same diagonal size can give very different width and height depending on the format.
👉 Quick example:
A 120″ 16:9 screen is about 105″ wide x 59″ tall.
A 120″ 4:3 screen is about 96″ wide x 72″ tall.
So yes, diagonal measurement is the industry standard — but always consider both diagonal size and aspect ratio to make sure the screen fits your space.
Boss Projector comes with free projector screen and free projector mount. you can visit at https://www.bestbuy.ca/en-ca/product/boss-projector-s7-4k-portable-mini-projector-w-screen-mount-for-indoor-outdoor-with-wifi-bluetooth-compatible-with-tv-stick-smartphone-hdmi-usb/18479178