Quick answer: Start with a lift that’s one-half to two-thirds of your measured leg length difference — not the full amount. Your body has spent years adapting to being uneven, and a full correction on day one often feels worse, not better. If you have pain, a difference over 1 inch, or a recent hip or knee surgery, confirm the height with a doctor or physical therapist first.
Why the Right Height Matters More Than the Lift Itself
After 10+ years of building custom shoe lifts, the most common problem I see isn’t bad materials or sloppy work — it’s the wrong height. Too little, and the pelvis stays tilted, so the hip and back pain that brought you here doesn’t improve. Too much, and you’ve swapped one imbalance for another: the corrected side now feels stilted, and your gait fights the shoe instead of settling into it.
The right height starts with one thing: an accurate measurement of your leg length discrepancy. Everything else follows from that number.
Step 1: Get an Accurate Measurement
If a doctor has already measured you — from a standing X-ray or a physical exam — use that number. If not, you have two good options: request our free measurement kit on the measure at home page (free shipping both ways, zero obligation), or use the DIY board-stack method in our step-by-step guide to measuring leg length discrepancy at home. Measure twice — the height we build into your sole comes straight from this number.
Step 2: Apply the One-Half to Two-Thirds Rule
Here’s the rule I use in the workshop, and the one most orthopedic professionals recommend: correct one-half to two-thirds of the measured difference to start. If your legs differ by 3/4″, a sensible first lift is 3/8″ to 1/2″.
Why not the full amount? Your muscles, hips, and spine have adapted to the imbalance — often over decades. A partial correction levels you enough to relieve strain while giving your body a few weeks to adjust. Many people stay comfortable at partial correction permanently; others step up to a fuller correction later. Going up is easy. Starting too high and fighting your own shoe is the mistake you want to avoid.
When Full Correction Is the Right Call
Some situations do call for correcting the full difference from the start — most often when a doctor or physical therapist prescribes it, after surgery where the surgeon knows exactly how much length changed, or for larger discrepancies in growing children. If any of those describe you, follow the professional’s number. We build whatever height is prescribed, from 1/8″ up to 4″ (with extended heights available beyond that).
Does Height Change Which Shoes Work?
Yes — the taller the lift, the more the shoe style matters. Small corrections up to about 3/8″ can sometimes ride inside the shoe as an insert. Beyond that, an external build-up bonded into the sole is the comfortable, stable option — it doesn’t eat up shoe volume or lift your heel out of the collar. Sturdy soles take tall builds gracefully: sneakers, boots, and work boots are the easiest. Slimmer profiles like dress shoes can absolutely be modified too — we taper the build so it reads as part of the original sole.
Give Your Body Time to Adjust
Expect one to three weeks of getting used to any new lift. The first days can feel unfamiliar — that’s your pelvis sitting level again, not something wrong with the lift. If after a few weeks something still feels off, re-measure and talk to us; adjusting height on the next pair is straightforward. And remember our guarantee: not happy? We’ll make it right.
This guide is general information, not medical advice. For pain, differences over 1 inch, or anything involving a child, confirm the correction height with a doctor or physical therapist.
Ready to Get Started?
Start by measuring at home with our free measurement kit — free shipping both ways, zero obligation. Then check our transparent shoe lift pricing (from $64.99) and place your order when you’re ready.