Fits Technology - FITS®

Discover The FITS® Difference

Function Matters.

We want to be the only socks in your sock drawer. So we are building socks for every aspect of your life, utilizing the best combination of materials, designs and our patented Full Contact Fit System®.

Be sure to use our FITS sock size chart to find the perfect fit.


Experience the comfort of a no blister sock. Our Full Contact Fit® keeps your sock in place to reduce any rubbing and abrasion to keep you blister free for miles.


Never ruin another pair of socks (or shoes) again with foot odor. The natural properties of Merino wool will keep odor and germs away and stink out.


Say goodbye to sweaty and hot feet when wearing FITS®. Merino wool will naturally wick moisture away for a dry and comfortable wear, always.

Meet the Full Contact FIT®.

Full Contact Cuff®

Unique, graduated compression keeps your socks from slipping down.

Stays in place all day

Does not stretch out

Comfortable and not constricting

Heel Lock®

Locks the sock in place while you move. No slipping, bunching, or rubbing.

No blisters or hotspots

Does not bunch in your shoe

A hug for your heel

Dynamic Toe Cup®

Conforms to the shape of your toes for zero bunching.

No bunching or rubbing

Stay in place seam

Fits the shape of your toes

These elements combined create the best fitting, best feeling sock for all of life's adventures.

100% Suit Grade Merino Wool

Temperature Regulating

Temperature regulating for unrivaled comfort. Stay warm in the winter, cool in the summer.

Moisture Wicking

Merino’s natural properties push mositure away for a comfortable and dry fit.

Odor Resistant

Naturally anti-microbial properties keep germs at bay so your feet are fresher longer.

Shop Our Collections

Designed to be the best for any adventure life throws at you, FITS® are ready to take you the extra mile.

The Hiker Series

FITS® ultra-fine merino socks provide the ultimate in comfort and performance for the many paths you take.

The Ski Series

Whether you’re headed uphill, downhill, or snowshoeing to your mailbox, FITS® Snowsports Series is perfect for every style of snow.

The Running Series

FITS Running Series comes in a variety of styles and weights. Whatever your pace, FITS will see you through to the finish.

The Casual Series

FITS® uses the finest materials available to craft something you’ll love that lasts. We deliver the best-fitting, most-comfortable feeling sock ever made.

The Compression Series

After collaborating with Board Certified Interventional Cardiologists, we determined the appropriate compression gradients within our Compression Series socks.

The Tactical Series

When you’re operating at the highest level, you need socks you can always depend on. With FITS®, you can stay focused on the task at hand and make sure you get the job done.

Find Your FITS® Today


Sock Sizing
women and men size chart

The Perfect Fit Starts With the Right Size.

Your sock size shouldn’t be a guessing game. Our socks range from small to double XL, but the best way to know the perfect fit for you is to match your shoe size to the chart on the left. That way, you’ll know the size you select will give you the fit and feel you expect.

Between sizes? Go with your gut, but rest assured that your socks will still fit great. If you receive your order and find yourself wishing you’d gone up or down a size, just let us know. We’ll happily send you replacements for your preferred size.

Concerned about laundry mix-ups? All FITS® socks are coordinated by color and size, based on the colors you see on the size chart. So, you won’t have to worry about mixing up your sizes with the other FITS® wearers in your home. (But stray socks mysteriously going missing in the dryer? Unfortunately, we can’t help with that.)


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The Light Hiker is perfect for everything from big adventures to everyday wear.
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How Do You Determine Sock Size?

Sock sizes are typically measured in inches, not by your shoe size. So, a sock size 6-8 will comfortably fit someone whose feet are between six and eight inches long. However, at FITS®, we make it easy for you to choose the ideal sock size without having to measure your foot. Simply use our sock size conversion chart based on your shoe size to select the right fit for you. 

How Do You Measure Your Foot for Socks?

To measure your foot for socks, measure the length from the heel of your foot to the tip of your longest toe. The measurement in inches correlates to your sock size. For example, if your foot is 10 inches long, a sock size 9-11 should fit you comfortably. At FITS®, you can skip this step and find your sock size based on your shoe size using our conversion chart. 

What Is the Sock Size Conversion?

The sock size conversion refers to sock size compared to shoe size. While all companies may vary slightly on which size socks to purchase based on your shoe size, you can always measure your foot to find the right fit for you. 

What is Sock Size to Shoe Size?

Because sock sizes are determined by the length of your foot in inches vs. your shoe size, shoe and sock sizes differ. The FITS® sock size to shoe size conversion is as follows:

Knowing this makes it easy to choose the ideal sock size based on your shoe size without measuring your foot. 

What Age is Sock Size 9-12?

Sock sizes typically don’t correlate with age. For kids, age can be a general indicator of what size sock they’ll need, but everyone is different. An adult sock size 9-12 fits anyone whose feet are approximately nine to twelve inches long. For kids’ sock sizing, check with the company to find exact details to ensure your little one gets the perfect fit. 

Got more questions about finding the perfect sock size for you? Let’s talk.



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Check out our best selling sock styles today! 
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