Toe-Rx is a molded foam trainer that holds your toes apart, so you can work them from a position they are almost never in. Ten minutes, sitting down, out of shoes.
Made in Japan since 1988 · Over 2,000,000 pairs sold
Toe-Rx is a molded polyethylene foam trainer with a slot for each toe. Put it on, sit, and it holds your toes open. Then you close them against it. The first part asks nothing of you. The second is the one that counts. About ten minutes per foot.
Open · 3–5 min
Circle · 10 each way
The foam spreads your toes wider than you can on your own — for most people, wider than they have been since childhood. Spreading them is not the goal; it is the setup for the second move.
Lift
Press
Release
Closing the toes from a spread position, from lifted toes, works the muscles inside the foot through a range they never meet in a shoe. This is the working part — and it is what a towel or a marble cannot give you.
The whole routine, step by step: putting it on, both phases, when to do it and when not to, every step photographed.
Ten minutes per foot, sitting down, bare feet, every other day — and there is one thing about it you should know before you buy anything. It's just below.
No significant change in anything measured.
Hallux valgus angle, active abduction angle, size of the muscle that pulls the big toe outward — none moved.
Improved significantly in all three.
Same orthosis, same eight weeks. The only difference was actively drawing the big toe outward against it.
Someone tested this directly: twenty-four people, one randomised trial, the device on its own against the device plus the movement. The passive half did nothing. The active half changed everything they measured.
So we are not going to tell you that sitting with something between your toes will change your feet. Toe-Rx opens them wide enough to train in, and gives them something to close against. The movement is the part that counts — which is also why ten minutes of it is a real ask, not a passive one, and why we say so before you buy.
Kim MH, Yi CH, Weon JH, Cynn HS, Jung DY, Kwon OY. Effect of toe-spread-out exercise on hallux valgus angle and cross-sectional area of abductor hallucis muscle in subjects with hallux valgus. Journal of Physical Therapy Science, 2015;27(4):1019–1022. The participants had hallux valgus and the orthosis was not Toe-Rx; the finding is about the movement, not the device. Read the study
Feet do different jobs, and the research does not say the same thing about all of them. We have written a separate guide for each — with the sources attached, including the parts that argue against us. Most people are the fifth one.
In a year-long randomized trial, runners who trained their foot muscles were 2.4 times less likely to get injured than a group doing stretching alone. What that shows, and what it doesn't.
Read the guide
Hallux valgus turns up in 53% of long-time climbers against roughly 12% of adults. We sell a foot product and we still think the first thing to look at is the shoe.
Read the guide
MRI found only two foot muscles consistently larger in dancers, and both are flexors. Years on pointe build the muscles that curl your toes — not the ones that spread them.
Read the guide
Toe push-off strength with the toes lifted went with agility in college football players — not with sprint speed. And the sport's own toe injury is one we cannot help with. We say so.
Read the guideThe upward curve on almost every shoe cuts the work your toe muscles do with every step. What that has been shown to do, what it hasn't, and what to do about it.
Read the guideEvery figure on those pages is sourced, and where a study's findings run out we say so in the section that cites it. None of the research tested Toe-Rx itself — we say that too. If you are none of the five, the routine is the same; only the reasons differ.
Both cost the same. The difference is how wide it opens your toes and how much it resists when you close them. Turn either one around below — the shape is identical; only the foam differs.
A gentler spread and less to close against. We recommend it first to everyone — not because feet are fragile, but because the movement is unfamiliar and the first week is where people push too hard. Move to Firm once Soft feels easy rather than merely bearable.
A wider opening and more resistance in the closing move. The right second pair for most people, and a fine first pair if you already train your feet and want the harder version from day one. Same price, so moving up is a decision about your feet, not your budget.
Three sizes. Use your everyday shoe size — not your sport shoe.
Cleats, climbing shoes, pointe shoes and racing flats are all fitted tight on purpose, and none of them tells you what this has to fit. Start from your street shoe size, or measure your bare foot. The full chart, plus what to do if you land on a boundary or your toes aren't average, is on the size guide.
Wrong size? Sizing from a shoe size is an estimate, not a guarantee. If yours pinches or slips, get in touch and we will exchange it. Please do that rather than adapting to it — wearing the wrong size is uncomfortable and can cause injury.
Shoe size gets you close. What actually has to fit is the width and thickness of your toes, so the models below are shown at the same camera distance — the difference you see is the real difference. Drag any of them to look at the slots.
Small
Women's US 4.5–7
Men's US below 7*
Medium
Women's US 7–9.5
Men's US 7–8.5
Large
Women's US 9.5–12
Men's US 8.5–14
Soft and Firm share the same shape in each size — only the foam differs — so one model per size is all you need to compare.
Start from your everyday shoe size
Not your sport shoe. Cleats, climbing shoes, pointe shoes and racing flats are fitted tight on purpose, usually a half to a full size under what your foot measures. They tell you nothing about what this has to fit. Use the shoes you walk around in — or better, measure your bare foot.
| Toe-Rx size | Women's US | Men's US |
|---|---|---|
| Small | 4.5 – 7 | below 7 * |
| Medium | 7 – 9.5 | 7 – 8.5 |
| Large | 9.5 – 12 | 8.5 – 14 |
* The maker's chart gives no men's range for Small. If your men's US size is below 7, you are in Small territory — but at that size, measure your bare foot rather than trusting a conversion.
If you land on a boundary, or your toes aren't average
Shoe size measures length. What has to fit here is width and thickness.
The one check that is actually to scale
On an iPhone or iPad, tap the AR icon on any model above (or on any product page) to place a full-size Toe-Rx on your floor. Hold your bare foot beside it. The screen can only show relative size; AR shows the real thing at the real size, and it is the closest you can get to trying one on before it arrives.
On Android, the same icon opens Scene Viewer.
Wrong size? Sizing from a shoe size is an estimate, not a guarantee. If yours pinches or slips, get in touch and we will exchange it for the size that fits. Please do that rather than adapting to it — wearing the wrong size is uncomfortable and can cause injury.
Traditional Japanese tabi are split at one place: between the big toe and the other four. Travellers in the Edo period walked the road from Tokyo to Osaka — many days, hundreds of miles — in them, with the big toe working on its own. That split is the same one Toe-Rx opens. The foam holds the big toe out from its neighbour, and the closing move works it back.
Toe-Rx is a single piece of molded polyethylene foam with a slot for each toe, made in Japan by the same maker since 1988. It is not a medical device and it is not clever. It holds a position, and it gives you something to close against. What it does beyond that is up to the ten minutes.
About these claims
The studies on this site tested toe-spreading and toe-gripping exercises, foot-muscle training, and toe strength in runners, athletes, dancers and older adults. None of them tested Toe-Rx itself. Where we have joined a finding to the product, we have said so on the page that cites it, and we have said where the finding stops.
We do not claim that Toe-Rx improves circulation, corrects posture, prevents injury, relieves pain, or treats bunions, hammertoe, plantar fasciitis or any other condition. Where the research on those questions exists, it is on the sport pages and in the blog — including the studies that argue against us.
Toe-Rx is not a medical device. If your foot hurts, if a toe is visibly drifting or curling, if you have reduced sensation in your feet, or if you have had an injury to a toe joint, speak to someone qualified before using anything that presses between your toes.
It is used sitting down, on bare feet, for about ten minutes per foot. Do not stand or walk while wearing it. Do not use it in the hour before running, jumping or playing sport. Wearing the wrong size can cause injury — check the size guide and we will exchange a pair that does not fit.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
