Z-CoiL Footwear generally runs true to size. Order the size that you most normally wear. If your current shoes are a variety of sizes, use the chart below to figure out what size you are in a Z-CoiL. If you wear a half size, please order the next size up unless it is one of the ones that runs in an E width (see "width" below), and follow the directions for fitting a 1/2 size shoe below. You can use the chart below by either measuring your foot in inches or centimeters or using European sizing. Measure your foot by having someone outline your foot on a piece of paper and measure from the longest toe to the back of the heel to get the size in inches or centimeters.
1. Remove the Z-CoiL Insole from the inside of the shoe.
2. Insert the 1/2 Size Insert
3. Replace the Insole
Z-CoiL has 4 different sized springs. The size of the shoe dictates what size of spring is loaded at the factory. In some cases, customers will choose a softer or stiffer spring based on their weight or gait type. Your objective should be to compress the spring about 75% during a normal walk (or a normal run -- if you run in Z-CoiL's). If you "bottom out" on the spring, you may want to consider a stronger spring. If you feel your shoe is too stiff, you may consider a softer coil. The vast majority of consumers do not change the factory spring strength.
|CoiL Diameter||Coil Size||Typical weight||Weight range of successfully fitted customers|
|6.2 mm||Small||up to 150 lbs.||90 to 300 lbs.|
|6.5 mm||Medium||120 - 200 lbs.||90 to 350 lbs.|
|7.2 mm||Large||160 - 240 lbs.||90 to 350 lbs.+|
|7.5 mm||X-Large||220 lbs. +||90 to 350 lbs. +|