Start with compatibility, not features
Before comparing monitor arms, check your monitor weight without its original stand, the VESA mounting pattern, and the desk surface where the arm will attach. Those three checks eliminate many poor matches before price or adjustment features matter.
Single or dual monitor arm?
A single arm gives each display its own mounting point and can be easier to position independently. A dual arm can create a cleaner two-screen workstation from one desk attachment, but monitor width, weight and arm geometry need more planning. If you use two displays, compare the options in our dual monitor arm guide.
Gas spring or mechanical?
Gas-spring arms are useful when you reposition a screen frequently because the arm is designed for smoother movement after it is correctly tensioned for the display. Mechanical mounts can make sense for screens that mostly stay in one position and may offer a simpler setup.
Check VESA fit
Confirm the exact VESA pattern supported by both the monitor and arm. If your display needs an adapter, include the adapter and its installation requirements in your compatibility check rather than assuming the mounting plate will attach directly.
Check monitor weight carefully
Use the monitor manufacturer's weight without the original stand when comparing it with an arm's supported range. Do not choose an arm only from screen size: monitors with similar diagonal measurements can have different weights and mounting requirements. For larger displays, see our monitor arms for heavy monitors guide.
Desk thickness and material matter
A C-clamp needs a suitable desk edge, enough underside clearance and a surface that can safely handle the load. A grommet mount needs an appropriate hole and mounting area. Check the arm manufacturer's desk requirements, especially with thin, hollow-core or glass desktops.
Measure rear clearance
An articulated arm can extend behind the mounting point as the screen moves. If your desk sits close to a wall, measure the available space before buying. Compact workstations may benefit from an arm with geometry that keeps more movement above the desktop; our small-desk monitor arm guide covers that use case.
Plan cable slack before installation
Display, power and USB cables need enough slack to follow the arm through its intended movement without pulling on ports. Route cables only after confirming the full range you expect to use.
When the original monitor stand may be enough
A monitor arm is not automatically better for every desk. If the original stand already provides the height and tilt you need, desk space is not constrained, or your desktop is unsuitable for a clamp or grommet, keeping the stand can be the simpler option. See our monitor arm vs monitor stand comparison for the trade-offs.
Our buying checklist
- Monitor weight without the factory stand
- VESA mounting pattern and any required adapter
- Single- or dual-display layout
- Desk thickness, material and underside clearance
- Space behind the desk for arm movement
- Required height, tilt, swivel and reach
- Cable length and routing through the movement range
Choose the arm that matches these constraints first, then compare convenience, build, adjustment style and price.
If you use a larger display, see our 32-inch monitor arm guide. For a height-adjustable workstation, use our standing-desk monitor arm checklist.