The whole range explained in order
Six sections, 48 products and a lot of numbers. This is the order to read them in, and the handful of figures that decide the outcome once everything else has been argued about.
A height-adjustable desk is worth having only if it reaches both of your heights, and the range that matters is the one between them, not the headline maximum. Almost every column in this catalogue travels from 28.3 to about 46.5 inches, which covers roughly 175 cm to well over 200 cm of standing height with the keyboard on the desktop.
If your seated figure lands below the bottom of that travel, the fix is not a different desk in this range. It is either a keyboard tray, which puts the typing surface about two and a half inches under the desktop and buys back exactly the height the column will not give up, or a footrest, which raises you instead. Both are in this catalogue and both cost a fraction of a desk.
The calculator on this site turns your height into the two figures and then checks the whole range against them, which takes about ten seconds and settles the question before any of the rest of this matters.
Depth decides more than width. At 23.6 inches, which is what the standard tops here measure, a 27 inch screen on the desktop sits closer to the eye than is comfortable, and the honest answer is either a deeper top or a monitor arm that pushes the screen back over the edge. At 30 inches deep the problem disappears on its own.
Width is about what else lives on the desk. A 47 inch top holds a laptop, an external screen and a notebook. A 55 inch top holds two screens without the mouse falling off the end. The 63 inch L-shape is a different proposition again: it fills a corner, gives a second working surface at right angles, and needs a room with a corner to give it.
Capacity is usually the least urgent number. Most tops here carry 176 pounds and the two largest carry 220, which is far beyond what a normal desk holds. The figure only becomes interesting under a heavy tower and three screens on a gantry.
Every desk with a top in this catalogue lifts on a single motor rated to 176 pounds, and that is enough for the load a desk of that size will ever carry. What a second motor buys is speed, a 264 pound rating and a noticeably steadier top at full extension, which is why it appears on 2 of the 5 bare frames rather than on the complete desks.
The practical test is width. On a top under 55 inches the difference is hard to feel. On a 70 inch top loaded at both ends, a single column at full height develops a wobble that two columns do not, and that wobble is the reason people replace a desk they otherwise like.
Storage on a moving desk is a trade. Drawers on the frame keep small things off the top and travel with it, but they take up the leg space on one side and they add weight the column has to lift. A keyboard tray costs nothing in leg room, drops the typing surface for a shorter person and is the single most useful accessory for anyone whose seated figure sits below the bottom of the travel.
The shelf models split the difference: an open shelf under the top holds a tower or a printer without closing in the leg space. Whichever way it goes, check the drawer side against the side you sit on, because a drawer under the leg you cross is a daily irritation.
A monitor arm returns the entire footprint of the factory stand, which on a 23.6 inch deep top is the difference between having room for a notebook and not. It also makes height and tilt adjustable without shims, so the top edge of the screen can sit level with the eyes instead of a few inches below.
Two figures rule out mounts and they are not the ones most people check. The first is weight per arm, which across these 18 mounts runs from 17.6 to 37.4 pounds and refers to the panel alone, without its factory stand. The second is the VESA pattern, the square of holes on the back of the screen: most mounts here take 75 by 75 and 100 by 100 mm, but not all of them take both, and a mismatch needs an adapter plate.
The third question is your desk rather than your screen. A clamp needs a clear underside and a top between roughly 0.4 and 3.5 inches thick, a grommet fixing needs a hole, and two mounts here stand free and need neither.
A drafting chair is a normal task chair with a longer gas cylinder and a footring, and it exists for one situation: a desk set at standing height that you occasionally want to sit at. On an ordinary chair that desk is unusable seated, and on a drafting chair it is not, because the footring gives your feet somewhere to be when the seat is at 30 inches.
The footrest solves the opposite problem. When the desk cannot go low enough, raising the floor is the same as lowering the desk, and it costs a great deal less. It is the answer for anyone under about 165 cm working at one of these columns, and it is worth trying before concluding the desk is wrong.