Monitor-arm fit resource
Monitor Arm Measurement Checklist
Most monitor-arm mistakes happen before checkout. Measure the desk, the display, and the space behind the desk first, then choose from arms that actually fit.
Before checkout
Quick checks
- Desk thickness at the clamp point
- Underside clearance below the rear desk edge
- Rear wall clearance for arm sweep and cable bend
- Monitor weight without the factory stand
- VESA pattern on the back of the display
- Cable length with the arm fully extended
Measure the desk edge first
Clamp arms need a stable rear edge, enough lip for the clamp plate, and clear space under the desk. A privacy panel, drawer rail, metal frame, or beveled edge can matter as much as the listed desktop thickness.
- Measure thickness where the clamp will actually sit.
- Check whether the underside has a crossbar, drawer, or cable tray in the way.
- Leave room for the clamp screw or lower plate, not just the top bracket.
Confirm monitor size and weight
Use the display weight without the stand, not the shipping weight. Dual arms usually list capacity per arm, while some product pages also list total span or max screen size.
- Check each screen separately on dual-monitor setups.
- Treat curved and ultrawide monitors as heavier fits unless the seller lists them clearly.
- Stay within both the size range and the weight range.
Check the VESA pattern
Most monitor arms support 75x75 and 100x100 VESA patterns, but thin displays, all-in-one screens, and some curved monitors may need an adapter. Confirm the screw pattern before ranking any arm as a fit.
- Look for four mounting holes on the back of the display.
- Confirm 75x75 mm or 100x100 mm spacing.
- Verify adapter needs before buying an arm.
Plan the movement envelope
A monitor arm is not just a vertical stand. It needs room to tilt, swivel, extend, and route cables. Wall-facing and shallow desks need the strictest rear-clearance check.
- Measure the gap between desk and wall.
- Check where the arm sits when the screen is pulled forward.
- Leave enough cable slack for sit-stand or full-motion use.
Fit questions
Common questions
What is the most important monitor-arm measurement?
Start with monitor weight without the stand and desk clamp thickness. If either one is outside the seller range, that arm should be removed from consideration.
Do I need to measure rear clearance if the product says low profile?
Yes. Low-profile arms reduce the clearance problem, but you still need room for adjustment, cable bend, and any wall-side sweep.
Should I use listed price to pick between two arms?
Only after fit is confirmed. The cheaper arm is the wrong buy if it misses monitor weight, VESA, clamp, or rear-clearance requirements.