VESA (Video Electronics Standards Association). VESA is an industry standard layout of screw holes at the back of your TV-Used for mounting your TV onto a stand or wall mount. The most common standards are: VESA 75x75, 100x100, 200x200, 300x300, 400x200, 400x400 and 600x400, 800x400.o for example 'VESA 600x400' means the measurement between the mounting screw holes will be 600mm Horizontally x 400mm Vertically. Example of VESA 600x400: In this example the mounting holes at the back of the TV are 600mm across and 400mm up/down. VESA 600x400.