First footrest I bought was a $12 inflatable ottoman. Looked fine, but by day three the seam split and I was back to resting my feet on a stack of old phone books. That's when I started measuring instead of guessing.
Here's what I learned from testing three cheap footrests (under $50) and why I still use the second one, not the third.
Why a footrest matters more than you think
My desk is 29 inches high, chair seat at 18 inches. My feet barely touched the floor, so my knees sat higher than my hips. That puts a weird curve in your lower back, and after four hours I felt it. A footrest under the desk fixes that by giving your feet something solid. The key measurement: your knees should be about level with your hips, or slightly lower, and your feet flat.
For my height (5'10") and desk setup, a footrest height of 4-5 inches worked best. If you're shorter, you might need taller. Measure the distance from the floor to the bottom of your thigh when the chair is adjusted.
What $15 gets you: the inflatable failure
The inflatable was a disaster. Not just the seam – it also wobbled too much. Every time I moved my feet, it shifted, and I'd have to reposition it. The surface was too soft to give any real support, and it eventually deflated to half its size.
For $15 I couldn't expect much, but it taught me that any footrest needs to be firm and have some grip on the floor.
The other $15 option is a plastic frame with a slightly cushioned top. That's what I tried second. It's a solid piece, about 17x12x4 inches, with a non-slip base. It feels cheap but it works. I've had it for eight months now, no cracking in the plastic, the cushion didn't flatten. The only downside is it slides a bit on hardwood if you push hard, but it stays put under normal use.
The $30 upgrade: does it actually add anything?
I tested a $30 model that's basically the same shape but with a memory foam top and a rocking feature. The rocking part is a gimmick – you can't really rock and keep your feet angled correctly. The memory foam is slightly more comfortable for bare feet, but if you're wearing shoes it doesn't matter.
What does matter: the $30 ones often have a wider foot pad and a more stable base. The one I tried had a larger footprint (19x14) and didn't move even when I shifted my weight. But if you don't need the extra width, the $15 version does the same job.
What you get by spending $60+
At $60 you get adjustable height. That's the real differentiator. A footrest that can go from 4 to 6 inches lets you dial in the exact angle your knees need, which is useful if you share a desk or if your chair height changes. One of my readers with a standing desk uses an adjustable one at 5 inches for sitting mode.
But for a fixed setup, I'd save the money. Measure once, buy the cheap plastic one, and be done.
The actual test: three months of daily use
I used the $15 plastic one for three months straight, eight to ten hours a day. The plastic hasn't bent, the surface hasn't worn, and I still don't feel the lower back ache after sitting. The only thing I'd change is adding a small piece of carpet tape to the bottom to keep it from sliding on my rug floor. That took two minutes.
My recommendation
If you have a fixed chair height and a typical desk, the $15 plastic footrest is good enough. Just make sure it's firm and has a non-slip base. If you plan to share it or adjust frequently, spend the extra for adjustability, but skip the rocking feature.
Measure the gap from floor to your thigh first. Then go find the cheapest option that hits that height. My rule: if it moves more than a half inch when you push with your foot, don't buy it.
Related reading: my messy notes on finding a Wirecutter office chair that actually worked. Or if you're on the heavier side, you might want the big and tall office chair 500 lbs first-week setup. For budget options, check my five black office chairs test. And if you've got a low desk, sometimes a desk stool is the direction you want to go.
Next step: grab the tape measure, sit in your chair, and check the height gap. Take that number with you when you shop. That's all it takes.