Understanding monitor arm capacity
Weight and depth matter most
While we provide suggested maximum screen sizes as a helpful starting point, monitor weight and depth are the only true indicators of compatibility. You should always check your monitor's weight and depth to confirm the suggested screen size.

Popular monitor sizes and styles
What does "suggested maximum screen size" mean?
The suggested screen size refers to the diagonal measurement of your monitor in inches (e.g., 24", 27", 32").
This is the standard way manufacturers describe monitors, measuring from one corner to the opposite corner of the display area.
Atdec's 'suggested maximum screen size' refers to the largest screen size that is likely to be mounted on the monitor arm or mount in question. It is a guide only.

Monitor size is a diagonal measurement, usually in inches
Why weight and depth are the critical factors
Physics governs how monitor arms function. Two factors determine whether an arm can safely support your display:
1. Monitor weight: the arm's gas spring or counterbalance mechanism must have sufficient capacity to hold your monitor's weight. Exceeding this capacity means the arm won't hold position properly - your monitor will droop or drift downward.
2. Monitor depth (front-to-back): this measurement determines the centre of gravity. A deeper monitor places more rotational force (torque) on the arm's pivot points. Even if two monitors weigh the same, the deeper one creates more stress on the mounting mechanism.
Monitors that have the same screen size often share roughly similar weight and depth - but this is not universally true. They can have significantly different weight and depth, meaning they don't suit the same monitor arm.

How to measure monitor depth
Curved Vs flat monitors: why different capacities?
You'll notice many (but not all) Atdec monitor arms list different weight capacities for curved versus flat monitors. This isn't arbitrary - curved monitors typically extend further from the mounting point due to their shape, shifting the centre of gravity forward and creating additional torque.
A curved monitor that weighs the same as a flat monitor often requires a higher-capacity arm because of this geometric difference.

Note the shallow depth of these 27" flat monitors

Note the depth of this 34" curved monitor
How to check your monitor's specifications
Before selecting a monitor arm, locate these specifications in your monitor's documentation or on the manufacturer's website:
- Weight (without stand)
- Depth (with stand removed)
Most monitors list dimensions as W × H × D (width × height × depth), with and without stand - use the 'without stand' numbers.
We're here to help
Selecting the right monitor arm shouldn't be guesswork. If you're unsure about compatibility or can't find your monitor's specifications, our team is ready to assist with your specification needs. Contact us for expert guidance on selecting the perfect mount for your setup.
Remember: suggested maximum screen size provides a useful guideline, always verify your specific monitor's weight and depth to ensure proper compatibility and safe operation.