How big is a vertical monitor?
Turned on its side, a 24-inch 16:9 monitor is about 11.8 inches wide and 20.9 inches tall; a 27-inch is about 13.2 inches wide and 23.5 inches tall. In pixels, a 1440p screen goes from 1440 to 2560 pixels tall, which shows about 78% more lines of code or text at once.
Where to put a vertical monitor
The usual layout is a landscape main screen in front of you with the vertical one to the side, angled in. Because a portrait screen is narrow, it only adds about 12–14 inches to your desk width.
Keep the vertical screen's top edge close to your main screen's top edge if you can. On a stand, the top of a vertical 27-inch ends up around 10 inches above a seated eye line, so you look up to read the top of the page. A monitor arm lets you lower it almost to the desk, which helps a lot.
Which monitors work well vertical?
IPS panels are the best choice, because their colour and contrast hold up at the angles you view a tall screen from. A 24-inch or 27-inch screen is the practical maximum; larger screens get too tall to read the top comfortably. Check that the stand rotates, or use a VESA arm.
Updated November 12, 2026 · Dimensions calculated from each screen's diagonal and aspect ratio.