VESA Mount Sizes and Patterns, Explained
What the numbers mean, how to measure your screen, and what to do when the mount and the TV disagree.
VESA pattern (formally VESA FDMI) is the grid of four threaded holes on the back of a screen. The number is the hole spacing in millimeters, width x height: a 400x400 screen has holes 400 mm apart in both directions. If the mount and the screen speak the same number, they bolt together.
Common sizes
Small monitors and TVs run 75x75 and 100x100; mid-size TVs 200x100, 200x200, and 300x300; large panels 400x200, 400x400, and 600x400; very large commercial panels 800x400 and up. As a rough rule, bigger screen means bigger pattern, but the only reliable source is the screen's own spec sheet or a tape measure.
How to measure
- Lay the screen face down on padding.
- Measure center-to-center between the left and right holes, in millimeters - that is the first number.
- Measure center-to-center between the top and bottom holes - that is the second.
If the holes are recessed or the back is curved, note the depth: rails may need the nylon spacers supplied with the mount so they sit flush (the screws must not bottom out).
When the numbers do not match
A mount does not have to be replaced because a screen's pattern outgrew it. Expert Mounts VESA adapter plates bridge the difference: the 11AD001 adapts to 200x100, the 22AD001 to 400x200, and the 22AD003 set covers 200, 300, and 400 patterns. Ceiling installs pick the head by pattern instead - the mount heads run from 200x200 to 600x400.
Weight still rules
A matching pattern is necessary, not sufficient: the screen must also weigh less than the mount's rated capacity, listed on every spec page. Screen size ranges on mounts are guidance; the pattern and the weight decide the fit.
Every Expert Mounts spec sheet lists the exact VESA range its hardware accepts. The line is sold factory-direct at VideoMountStore.com; fit questions: 855-566-8687.