What is VESA Mount Size? A Complete Guide to Finding the Right Fit

VESA mount size refers to the spacing between the four mounting holes on the back of a monitor or TV — measured in millimeters. The most common VESA sizes are 75×75 mm and 100×100 mm for monitors, and 200×200 mm to 600×400 mm for TVs. Matching your screen’s VESA pattern to the monitor arm or wall mount is the difference between a 10-minute install and an unusable purchase.

This guide explains how VESA sizing works, how to find your monitor’s exact pattern, and how to handle screens that don’t have a VESA mount at all. By the end you’ll know exactly what mount to buy for your screen — and how to avoid the most common compatibility mistakes.

What VESA Actually Means

VESA stands for Video Electronics Standards Association — the industry body that created the universal mounting standard for displays. The standard defines the spacing pattern of the four threaded holes on the back of any compliant screen.

The “size” is the distance between the holes, measured horizontally and vertically in millimeters. A 100×100 mm VESA pattern means the holes form a 100mm-by-100mm square.

Almost every monitor and TV sold in the past 15 years follows the VESA standard. The few that don’t are usually ultra-thin designs (some Apple iMacs, some thin-bezel monitors) that require a separate VESA adapter to mount.

Common VESA Mount Sizes

For most home office monitors in the 24 to 32-inch range, you’re looking at 100×100 mm. This is the most universally supported pattern — almost every monitor arm and wall mount fits it.

How to Find Your Monitor’s VESA Size

Three methods, in order of reliability.

Check the Manual or Specs Page

The manufacturer lists VESA specs in the technical specifications. Search the model number plus “VESA” or “specifications” — the result page usually has it.

Measure the Hole Pattern

Tilt the monitor forward to see the back. Look for the four threaded holes (sometimes covered by plastic plugs or stickers). Measure the horizontal distance between two adjacent holes, then the vertical distance.

Common measurements: 75mm = small monitor, 100mm = standard monitor, 200mm = large monitor or small TV. Round to the nearest standard size — manufacturers don’t deviate by even a few millimeters.

Test With a Ruler Against the Existing Stand

If the original stand is still attached, the four screws holding it are at the VESA pattern. Measure between the screws.

What If Your Monitor Has No VESA Mount

Some monitors and most Apple displays ship without VESA holes. Two solutions exist.

VESA Adapter Brackets

A VESA adapter clamps to the monitor’s existing stand mount or attaches to the screen’s back panel. Provides standard VESA holes for a monitor arm.

The HumanCentric VESA adapter brackets cover most non-VESA monitors and TVs. Specific adapters exist for Apple displays — the OWC iMac VESA Adapter Kit fits 21.5 and 27-inch iMacs.

Check Manufacturer-Specific Mounts

Apple, Samsung, and a few other manufacturers offer their own mount adapters that integrate cleanly with their displays. These cost more than universal adapters but look better.

Choosing a Mount That Fits Your VESA Size

Most monitor arms and wall mounts list compatible VESA patterns prominently. Check before buying — the wrong pattern means an unusable mount.

For Standard Monitors (100×100 mm)

The Ergotron LX, Jarvis Monitor Arm, and Mount-It! MI-MD401 all support 100×100 mm. This is the safest default for any 24 to 32-inch monitor.

For Larger Monitors (200×200 mm)

Look for “supports up to 200×200 mm” in the spec sheet. Many premium monitor arms support both 100 and 200 patterns.

For Small Monitors (75×75 mm)

Smaller and budget mounts. Check the spec sheet — some monitor arms include a 75×75 adapter plate, others don’t.

For TVs (400×400 mm and Up)

Wall mounts rather than monitor arms. The Mounting Dream MD2380 covers 400×400 mm patterns; larger mounts handle the full range up to 800×600 mm for 80+ inch TVs.

Weight Capacity Matters Too

VESA pattern is one half of the compatibility check. Weight capacity is the other.

Most monitor arms support 10 to 20 pounds. A 27-inch monitor weighs 8 to 12 pounds — within range. A 32-inch ultrawide can weigh 18 to 25 pounds — at the upper limit of standard arms.

Always check the arm’s weight rating against your monitor’s weight (in the spec sheet). Going over the rating causes the arm to sag, the gas spring to fail, and in extreme cases the monitor to fall.

Common VESA Mount Mistakes

Assuming all monitors are 100×100 mm. Most are, but not all. Curved ultrawides and 32+ inch monitors often use 200×200 mm. Check the spec sheet.

Buying a wall mount that doesn’t list VESA range. Generic wall mounts sometimes list only “supports 32-65 inch TVs” without VESA specifics. These can fit some monitors and not others. Verify the VESA range explicitly.

Ignoring the screw length. VESA mounts come with multiple screw lengths because monitor backs vary in depth. Use the screw length that matches your monitor’s mounting depth — too short doesn’t reach, too long can damage internal components.

Forgetting weight capacity. A monitor arm rated for 15 pounds will sag under a 25-pound monitor. Check both VESA size and weight when buying.

Removing the existing stand without checking what’s behind it. Some monitors have permanent rear panels that the stand attaches to — the VESA pattern is on the panel, not the monitor itself. Don’t force-remove anything.

Tools You’ll Need to Install

Most VESA installations need only basic tools:

• Phillips screwdriver (sized to your monitor’s screws)
• Allen wrench set (some monitors use Allen-head VESA screws)
• Tape measure or ruler for confirming hole spacing
• Spirit level (for wall mounts)
• Stud finder (for wall mounts that drill into wall studs)

For wall mounts specifically, anchor points matter more than the mount itself. Always mount into wall studs — drywall anchors can’t safely hold a monitor or TV long-term.

VESA on Sit-Stand Desks

Sit-stand desk users especially benefit from VESA-mounted monitors. The monitor arm provides the vertical adjustment range your desk creates.

Look for monitor arms with at least 13 inches of vertical travel. The Ergotron LX and Jarvis Monitor Arm both meet this. With these, you can set the monitor for both sitting and standing positions without re-adjusting the screen tilt or stand each time.

For more on standing desk monitor setup, see our standing desk setup guide.

Frequently Asked Questions

What is the most common VESA mount size?

100×100 mm is the most common pattern, used on the majority of 24 to 32-inch monitors. Most monitor arms and wall mounts default to supporting this size.

How do I know if my monitor is VESA compatible?

Look at the back of the monitor. If you see four threaded holes in a square or rectangular pattern, it’s VESA compatible. The hole pattern (75×75, 100×100, 200×200, etc.) determines which mount fits.

Can I mount any monitor on any monitor arm?

Only if the VESA pattern and weight capacity match. Check both specs before buying. Universal mounts often list multiple compatible VESA sizes (75×75, 100×100) and a maximum weight rating.

What if my iMac or Apple display has no VESA mount?

Use a VESA adapter kit. The OWC iMac VESA Adapter Kit covers most iMac models. For Apple Studio Display and Pro Display XDR, Apple sells a specific VESA mount accessory at order time. Aftermarket adapters exist for displays that ship without it.

How heavy a monitor can a VESA mount support?

Depends on the mount, not the VESA pattern. Standard monitor arms support 10 to 20 pounds. Heavy-duty arms (Ergotron HX, Jarvis Heavy Duty) support up to 42 pounds. Wall TV mounts can hold 100+ pounds. Match the mount’s rating to your monitor’s actual weight.

VESA compatibility is straightforward when you check three things: the monitor’s hole pattern, the mount’s supported patterns, and both weight ratings. Get those right, and the install takes 10 minutes — not an afternoon of returns and second-guessing.