How Are Walking Stick Ferrules Measured?6 July 2021 | Admin 1: How Do You Measure A Walking Stick Ferrule? The correct way to measure the size of the rubber ferrule you need for your walking stick is to remove the old ferrule and measure the external diameter of the tube ( edge to edge ) at the bottom of your walking stick. Do not measure the hole in your old ferrule as this may give you an incorrect reading. Also, we would recommend you use a ruler and not a tape measure to get the most accurate measurement. If you find this a little difficult you can always order our free 'measuring guide card' by clicking here. This measuring guide card will help in ordering the correct sized ferrule you need for your walking stick. It has semi-circle cutouts with a size against each size which you put against your walking stick.You can find our full range of walking stick ferrules by click the link here Measuring Instructions | Order Our Free Measuring Guide Card | | | |