Z-CoiL Footwear Size Guide

Z-CoiL Footwear generally runs true to size. Please order the size you normally wear. If you wear a half size, we recommend ordering the next size up. 

Women's Sizes

Men's Sizes

Adjusting for Half Sizes

Follow the instructions below to adjust the half sizes. Z-CoiL does not manufacture half sizes. However, every pair includes a 3mm insert to adjust the fit. If you are between sizes, follow these steps:

1. Remove the Insole: Take out the Z-CoiL insole from the shoe.

2. Insert the 3mm Half-Size Insert: Place the insert inside the shoe where the insole was.

3. Reinsert the Insole: Put the insole back on top of the insert.

This adjustment helps achieve the perfect fit for half sizes.

Spring Strength Guide

Z-CoiL shoes come with four different spring strengths, predetermined by shoe size. While most customers find the factory settings ideal, some may need adjustments based on their weight or walking/running style.

Spring Strength Recommendations:

• Small Spring: Women's sizes 5-7 (up to 150 lbs)
• Medium Spring: Women's sizes 8-11, Men's sizes 8-9 (120-200 lbs)
• Large Spring: Men's sizes 10-13 (160-240 lbs)
• XL Spring: Men's size 14+ (220 lbs+)

Tip: Aim to compress the spring about 75% during normal walking. If you "bottom out" (fully compress the spring), consider a stronger spring. If the shoe feels too stiff, you may prefer a softer coil.

Requesting a Stiffer Coil: If you prefer a softer or stiffer coil, please add a note to your order at checkout. We will gladly exchange the coil to suit your needs better.

Width Options

All Z-CoiL shoes are designed with a wider toe box to reduce irritation in the toes and ball of the foot.

Width Descriptions:

• D Width (Wide): Available in the Freedom, Legend (all), Olivia, Sofia, Toffler, and styles.
• E Width (Extra Wide): Available in the Outback, Prime, and Sidewinder styles.

Choose the width that provides the most comfort and accommodates your foot shape.

Additional Information

If you have specific needs, such as adjusting for over-pronation or requiring a custom fit, please contact our customer service at 800.268.6239 or email painfree@zcoil.com