Heel Pitch vs Heel Height: Why 70 mm Feels Like 90

A 90 mm heel with a 30 mm platform puts your foot at the same angle as a 60 mm heel with no platform. The number on the box is heel height; what your calf and the ball of your foot respond to is pitch, the angle of the footbed.

Height, pitch and platform are three different numbers

Heel height runs from the ground to the top of the heel at the back. Platform height is the sole thickness under the ball of the foot. Pitch, sometimes called effective heel height, is the net rise: heel height minus platform. The angle is that net rise divided by the horizontal heel-to-ball distance.

Three labels, one line of arithmetic. Problems start when a listing collapses all of it into a single “heel height” figure. A platform sandal can advertise 120 mm against a pump at 90 mm, and the pump can still be the steeper shoe once the platform enters the sum. Reading the numbers separately, then subtracting, is the whole skill.

Shoe	Heel height	Platform	Net rise	Pitch angle
Court pump	90 mm	0 mm	90 mm	about 27°
Platform sandal	120 mm	30 mm	90 mm	about 27°
Kitten heel	45 mm	0 mm	45 mm	about 14°

The pump and the sandal share a pitch despite 30 mm of difference in height, because the platform lifts the front of the foot by what it adds at the back. The kitten heel sits in a different league: at 45 mm with no platform the angle is gentle, but the heel is small enough that stability, not pitch, becomes the limiting factor. A low heel that widens under the foot can be easier to wear all day than the angle alone predicts.

Why 70 mm can feel like 90

The angle depends on footbed length as much as on rise. A short shoe has a shorter heel-to-ball distance, so the same heel height produces a steeper angle. A 70 mm heel over 140 mm gives roughly the pitch of a 90 mm heel over 180 mm.

Footbed length scales with shoe size, which means the same design is steeper in a 36 than in a 42. Two buyers wearing one label can be standing on different angles. Sizing up lengthens the heel-to-ball distance and softens the slope, though only slightly, and it shifts where the widest part of your foot meets the widest part of the shoe, which is a separate fit question.

A pointed toe changes the picture too. When the toes are held forward in a narrow end, the ball of the foot sits closer to the heel than the footbed length suggests, and the load per square centimetre rises. Rounder toe shapes keep the foot where the geometry assumes it is.

Where the load goes

Raising the heel shifts weight forward. Against a flat shoe, a 50 mm heel increases forefoot pressure by roughly 75 per cent, and a 90 mm heel by more than 100 per cent, according to podiatric summaries. The foot also sits plantarflexed, which shortens the calf over time.

Pressure concentrates under the metatarsal heads, the knuckles behind the toes. That is why a steep shoe can feel fine for the first hour and bruised by evening: the tissue under those heads compresses under a load it was not shaped to carry. Cushioned insoles spread the load across more of the footbed, but they also raise the sole under the ball, which changes the pitch you just measured. Nothing is free.

Shape changes how the same pitch feels. A block heel puts more material on the ground than a stiletto, reducing the ankle wobble the wearer must control, while a wedge fills the space under the arch and leaves a gentler footbed angle than the heel height suggests.

The wobble matters more than it sounds. A stiletto forces the ankle to correct small shifts continuously, and that effort adds fatigue on top of the forefoot load. The same pitch on a broader heel trades some of that muscular work away.

Running shoes publish this geometry as drop

Running shoes are the one category that prints the arithmetic on the label. Brands list the stack height under the heel, the stack under the forefoot, and the difference between them, called drop or offset, in millimetres. Most conventional running shoes sit between 8 and 12 mm of drop; zero drop means a level platform, heel and forefoot at the same height. The numbers behave exactly like heel height and platform: a shoe with a thick sole can still have a modest drop, because the difference, not the thickness, sets the slope.

Independent lab measurements of finished running shoes have come in a millimetre or two away from the advertised figure, and category names overlap between brands, so the millimetre value is the more useful number. The lesson transfers. If a running brand can print heel stack, forefoot stack and the difference for a pair you cannot try on, the absence of any equivalent figure on a dress listing is a choice, and the tape measure fills the gap.

Measuring pitch on your own shoes

Measure the heel height vertically, the platform under the ball, and the horizontal heel-to-ball distance. Take heel height minus platform and divide by the distance, and you have a slope you can compare across shoes. It is a static model, since walking adds motion and cushioning, but it separates shoes with the same height label.

Do it on a hard floor with the shoe empty and standing square. A book held against the back of the heel gives you a vertical reference, and the phone in your pocket has a level app if you want the angle read directly. Measure both shoes rather than one, because manufacturing tolerance means the pair can differ, and a difference you notice walking may be real. Write the three numbers inside the box lid and the comparison survives long after the receipt is gone.

What listings tell you, and what they hide

A product page almost always quotes heel height. It often omits the platform, and it virtually never quotes pitch, because pitch is the number that makes a tall shoe look steep. Where a platform does appear, it tends to be described rather than measured, as in “hidden platform”, with no thickness attached. “Hidden” tells you where the sole sits, not how much it lifts.

The order of scrutiny that follows: take the quoted height, subtract any platform you can measure or estimate from photos against a scale reference, and compare the net figure between candidates before anything else. If a listing gives no platform at all and the photo shows a thick forefoot sole, assume the pitch is flatter than the height implies and ask support for the measurement. A support team that can answer a heel-to-ball question is also telling you something about how seriously the brand grades its own shoes.

What to check in the toe box

Forward load pushes the foot forward in the shoe, so a high-pitch shoe needs vertical room as well as width. Toes bunched against a shallow toe box is a fit problem, not a break-in problem. Pair a steep shoe with the fit advice in wide-fit shoes, and check clearance with ankle boot shaft and calf fit before buying a heeled boot.

The direction of travel matters as much. In a steep shoe your foot slides forward until something stops it, and that something is usually the toes. A strap or lace holds the ankle back instead, which is why an ankle-strap sandal tolerates pitch that a slip-on pump cannot, at the same height. Before buying, push your foot forward in the shoe by hand and see what stops it. The answer to that question predicts most of the discomfort, and the pitch you can tolerate across a full day is the one that decides whether one shoe survives from commute to dinner.