You can measure your old cane if you have it.2. If you can't measure your old cane just put on the shoes you usually wear and ask someone to measure the distance from the floor to your wrist join (your arm should be relaxed).3. You also can use the chart below. Please note, this is the least accurate method, use it only if you can't use the previous two methods.Disclaimer: this information in no way replaces a medical professional's recommendation.