- Jon, Retired Navy SEAL
We worked with the elite to develop the best performing and fitting socks, just for you. Because when it matters most, your feet cannot fail.
Merino wool is naturally flame resistant and outperforms all other textiles.
Experience the freedom of complete range of motion without your socks falling down.
Push yourself to the limit knowing your feet will stay protected. No blisters, ever.
Moisture-wicking and quick drying with naturally antimicrobial merino wool.
"I've been an advocate of FITS socks since I first found them before a deployment in 2011. They were the best socks I ever wore in the Marine Corps. These are the socks you want if you depend on your feet, I now wear them everyday on the street as a cop. Thanks for great socks and great service!"
"The finest boot socks that I've worn in 23 years of military service. They're comfortable, breath well, and hold up well to constant wear. Made in the U.S.A. is a big plus too!"
"I bought my first pair at Ft Lee, VA in 2016, and have since bought every pair of socks I’ve ever need from y’all! Great comfort, very breathable, and wicks sweat. Great for military use and civilian work as well. I’ll never buy anything other than Fits again!"
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.)
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.
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.
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.
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.
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.