You measure the desk. You measure the pedestal. On paper, it fits. Then it shows up, and the top drawer catches on the desk apron, or the casters sit half an inch too tall to roll all the way under. It's one of the more common reasons under-desk storage gets returned or ends up parked beside the desk instead of underneath it, and it almost always comes down to one number nobody checked: clearance height, not width or depth.
If you're shopping for a mobile pedestal and want to get this right the first time, here's exactly what to measure and why the number on a product page rarely tells the full story.
A pedestal fits under a desk when three numbers line up: desk clearance height (floor to the underside of the work surface), pedestal height including casters, and enough width and depth to clear desk legs or a center support.
What Actually Determines Whether a Pedestal Fits
Fit isn't one measurement, it's three working together. A pedestal that's narrow enough and shallow enough can still fail to slide under a desk if its height, including casters, exceeds the clearance underneath the work surface. Most buying mistakes trace back to skipping that third number.
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Width: needs to clear the space between desk legs, or between a leg and a center drawer support.
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Depth: has to sit within the desk's front-to-back footprint without cutting into your legroom.
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Height: floor to the underside of the desk surface, minus anything that hangs lower, like a cable tray or a cross-bar between the legs. This is the one people skip.
How to Measure Your Desk's Clearance Before You Buy
Four checks, all doable with a tape measure and a few minutes:
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Measure floor to the underside of the desk surface at the exact spot where the pedestal will sit, not at the front edge, if the desk has an apron or support beam that hangs lower there.
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Check for anything eating into that clearance: cable trays, a center drawer, a cross-bar between the legs.
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Measure the width between the legs, or between a wall and a leg if it's a corner or L-shaped setup.
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Measure how far back you can go before your knees run out of room. Depth matters twice, once for the desk, once for you.
CEHA's Pedestal Dimensions, and What They Actually Mean
Both JMKG pedestals measure 15.3"W x 19.1"D x 23.2"H. Fixed-height desks are commonly built to a 28 to 30 inch floor-to-surface range, a default used widely across furniture manufacturers.
That typically leaves several inches of clearance above the pedestal on a desk built to that range, enough for the casters plus a bit of margin. But "standard" is a manufacturing default, not a guarantee for your desk. CCOHS's own ergonomics guidance is built around measuring your actual setup rather than assuming a standard number applies, since desk height, chair height, and body dimensions all interact.
If your desk has a lower apron, a keyboard tray track, or a work surface set lower for ergonomic reasons, that gap shrinks fast.
See both configurations in CEHA's pedestal collection.
2-Drawer or 3-Drawer: Does the Choice Change Whether It Fits?
No. Footprint is identical between CEHA's 2-drawer and 3-drawer JMKG pedestals, the difference is capacity, not clearance. A 3-drawer adds a dedicated file drawer for hanging folders, while a 2-drawer keeps things simpler for someone who mainly needs a lockable spot for personal items.
For a fuller breakdown of when a pedestal beats a standalone filing cabinet, see Office Pedestal vs. Filing Cabinet: Which One Fits in 2026?
What to Do If Your Desk Clearance Is Tight
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Slide it beside the desk instead of under it. Locking casters mean it still travels with you between hot-desk assignments.
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Check whether your desk has a removable center support or cable tray that's eating clearance you don't actually need.
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If you're consistently short a couple of inches, switching to a 2-drawer won't help. Height is identical across both configurations, so a smaller footprint doesn't buy you more clearance.
Do all mobile pedestals fit under any desk?
No. Height, not width or depth, is the number that most often rules a pedestal out. Always check floor-to-underside clearance at the exact spot the pedestal will sit before ordering.
What if I don't know my desk's clearance height?
Measure it. A tape measure from the floor to the underside of the work surface, taken at the point where the pedestal will actually sit, takes under a minute and prevents the most common under-desk storage return.
Buying a pedestal that fits shouldn't take a second attempt. The width and depth numbers on a product page are only two-thirds of the answer. Measure the clearance under your own desk first, compare it against 23.2 inches, and you'll know before it ships whether it slides under or needs to sit beside instead. CEHA's 2-drawer and 3-drawer pedestals ship free across Canada, and you're welcome to see both in person at our GTA showroom before you commit.
Measure once, order with confidence.
Browse CEHA's 2-drawer and 3-drawer pedestals, both built for standard Canadian desk clearance.
Built with 53 years of metal manufacturing expertise. Built for Life in Canada.
