Without the VESA interface standard, it will be relatively difficult to find an arm that correctly supports your screen. Luckily for us, VESA is widely available and many PC monitors and televisions have it.
To put it simply, it allows you to define the distance in millimeters between the four necessary holes located behind your screen. The easiest way is to check if you have these four holes which are easy to distinguish. Another important point is that there are several VESA sizes, the most commonly used are: