Trace the part that actually rests on the shelf

Measure the monitor base at its widest and deepest points, including each end of V-shaped feet. Compare that outline with the riser's usable supporting surface, excluding any area the maker does not intend to carry equipment. If you rotate the display, check whether the base moves or any part of the equipment needs extra clearance.

In an illustrative case, the base measures 360 mm across and 230 mm deep. A 400 × 200 mm shelf is wide enough but too shallow to contain that outline. Turning the shelf or allowing unsupported overhang is not an automatic solution; the manufacturer's permitted arrangement still determines suitability.

Read the load field with the arrangement in mind

Find the monitor's weight including its original stand. Include other objects only if the riser maker permits them in the intended arrangement, and compare the combined load with the stated limit. Do not assume that a rating applies to stacking two risers, extending a shelf or using a different assembly position.

For a made-up example, an 8 kg monitor and a permitted 1 kg accessory total 9 kg. That total is a comparison input, not a new recommended load. A shelf looking thick or being made from metal does not replace a rating. If the product leaves the allowed load unclear, ask before putting equipment on it.

Measure the opening as a separate space

Record the clear width, depth and height underneath, taking account of legs, drawers and braces. Measure the keyboard at its widest and tallest points, including raised feet, a wrist rest or a cable connector that stays attached. Think about the direction in which you will slide it, not just whether it can sit inside.

An illustrative 430 mm keyboard will not fit through a 420 mm opening even if the riser's exterior is 500 mm wide. A 35 mm keyboard inside a 40 mm-high opening also leaves little handling space. The arithmetic identifies a question to test; it does not define a universal clearance allowance.

Decide whether you need extra height at all

First explore the monitor's existing adjustment in your normal working arrangement. WorkSafe Victoria advises setting up screen position after chair and desk height. A shelf selected for its storage space can still raise the display beyond the position you want. Note the desired change before choosing the height of a riser.

Check the screen's clearance beneath any wall shelf and the room needed for connected cables. If a drawer is part of the riser, include the distance it travels when open. Avoid testing height by balancing the monitor on an improvised stack; plan the dimensions on paper and use equipment as its maker intends.

Build a four-part fit record

Your record should separate supporting surface, allowed load, under-shelf opening and total installed height. For a riser with a drawer, add a separate field for the drawer interior. Those field names refer to different spaces: a drawer measurement cannot establish keyboard clearance beneath it. Write the dimension and what it measures together, then compare each field with the item that must fit there.

Keep unresolved measurements visible in the record. If a keyboard-storage requirement is optional, you might still choose a suitable monitor support with no confirmed storage fit. If storage is the reason for buying, an unknown opening is a reason to keep looking. The best choice depends on which problem the purchase must solve.

Sources and further reading