How to Choose a Monitor Arm: Weight, Desk Thickness, VESA

Choose a monitor arm by matching its load range, desk clamp range and VESA pattern (the standard screw-hole layout on the back of a monitor) to your setup. Among current monitors from major brands, an arm with a minimum load of 2 kg or less and a maximum of 4.5 kg or more covers every monitor compared. The monitors checked weigh 2–4.5 kg without the stand.

This compares current arms from Ergotron, ELECOM, Sanwa, VIVO and other major brands using the makers’ specs as of October 2026.

The three conditions an arm must meet

These are the three checks this article compares. An arm fits when all three pass.

• Weight: the monitor without its stand is at or above the arm’s minimum load and at or below its maximum
• Desk thickness: the desktop is within the range the clamp can grip
• VESA: the arm’s mounting plate matches the screw-hole spacing on the monitor

If the maker also lists a supported screen size, check that too. This article did not look at whether screen size or load limit takes priority.

Arms by monitor weight

Compare the “without stand” weight from the monitor’s spec sheet. (Assumptions: current arms from major brands and the makers’ published ranges. The weight compared is the monitor without its stand)

• “Can’t be checked” means the maker doesn’t publish a minimum load. Those arms are not counted as in range
• Among current arms from major brands, in range by weight, 2 kg to 4.5 kg: 9+; up to 11.3 kg: 4+; up to 19.1 kg: 1+; beyond that: none
• Among the monitors compared, 4 of them weigh less than the 3.2 kg minimum load of one arm checked. A monitor under the minimum can make the arm rise by itself

Arms by desk thickness

Every arm clamps a fixed range of desktop thickness. (Assumptions: the clamp specs of current arms from major brands, without counting grommet mounts that need a drilled hole)

• Among current arms from major brands, a 10 mm desk fits 11 and a 15 mm desk fits 12. Clamping by desk thickness, 20 mm to 50 mm: 13+; up to 85 mm: 7+; up to 108 mm: 1+; beyond that: none
• Glass and hollow desktops were not checked

How to check your own setup

1. Find the monitor’s weight. Use the “without stand” figure on the spec sheet
2. Measure the desk thickness. Measure the edge where the clamp will grip
3. Match the monitor’s VESA spacing to the arm’s supported patterns. Among the monitors compared, all use 100×100 mm screw holes, and every arm compared takes 100×100

All three checks must pass. The tool below does them for you.

Picks by condition

One pick per condition. These were not tested in person.

Monitor 2–4.5 kg without the stand, desk 20–50 mm, VESA 100×100

The maker’s spec covers 2–7 kg load, VESA 75x75 / 100x100, desktops 10–102 mm thick (maker specs). With a minimum load of exactly 2 kg, this pick is borderline for the lightest monitor checked.

Sold by Amazon.com (Amazon's own brand). The 2 kg minimum load is from Amazon's product page; the 7 kg maximum and the clamp range are from the manual. Whether the rating count is shared with other models wasn't checked.

Monitor 15 kg without the stand, desk 20–50 mm, VESA 100×100

The maker’s spec covers 9.1–19.1 kg load, VESA 75x75 / 100x100 / 200x100 / 200x200, desktops 10–66 mm thick (maker specs). Its maximum is above 15 kg, so a 15 kg monitor isn’t at the limit. The VIVO pick below tops out at exactly 15 kg.

Sold by Ergotron, Inc (maker). Matte black, standard pivot (45-475-224). Delivery was free to New York 10001 on the check date.

Monitor 10–12 kg without the stand, desk 70–80 mm, VESA 100×100

For a heavier monitor on a thick desk, VIVO’s manual lists 1–15 kg load, VESA 75x75 / 100x100, desktops 10–85 mm thick (maker specs).

Sold by VIVO (ships from Amazon). Black (STAND-V101G1). The maker also sells a white version (STAND-V101G1W) as a separate listing.

FAQ

Why does my monitor arm keep rising with a light monitor?

A monitor lighter than the arm’s minimum load can make it rise by itself. 4 of the monitors compared weigh less than the 3.2 kg minimum load of one arm compared.

Is an arm’s weight limit compared with the monitor with or without its stand?

Use the weight without the stand, because the stand comes off when you mount the arm. Among current arms from major brands, in range by weight, 2 kg to 4.5 kg: 9+; up to 11.3 kg: 4+; up to 19.1 kg: 1+; beyond that: none.

Can a monitor arm clamp onto a thin or thick desk?

Each arm clamps only a set range of thickness. Among current arms from major brands, a 10 mm desk fits 11 and a 15 mm desk fits 12.

Clamping by desk thickness, 20 mm to 50 mm: 13+; up to 85 mm: 7+; up to 108 mm: 1+; beyond that: none.

Can a monitor with no VESA holes go on an arm?

A monitor with no VESA holes cannot attach directly to the arm; check whether a compatible mounting adapter exists. This article did not check adapter fit.

Every monitor compared uses 100×100 mm holes, and every arm compared takes 100×100.