Sock Size Converter

Convert shoe size to sock size — for athletic, dress, and casual socks. Works for US, UK, EU.

Shoe → sockMen + womenAll regionsFree

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Shoe region

Your shoe size

Sock size

💡 Most socks are sized in ranges (e.g., "Men's 6–12"). Pick the bracket your shoe size falls in. Toe-shaped socks (toe socks, anti-blister) need exact sizing — buy the smaller bracket if between.

Sock cut styles + when to wear them

No-show / liner

Invisible under loafers, sneakers. Most popular for summer. Tend to slip off heel — silicone-grip versions stay better.

Ankle / quarter

Goes just above the ankle bone. Athletic socks. Most common for running, casual wear.

Crew

Mid-calf. Standard daily wear, workout, hiking. Best balance of warmth + visibility.

Mid-calf / trouser

Above the calf. Dress socks. Should NOT slip down (the cardinal sin of dress socks).

Over-the-calf / knee-high

Below knee. Dress, formal, equestrian, compression. Stays up best — won't bunch at ankle when sitting.

FAQ

Why are socks sized "M / L" instead of foot length?

Stretch! Cotton-blend socks stretch ~30%, so a single "L" fits a 9–12 size range. Wool and merino stretch less — sizing is more precise.

I'm between sock sizes — up or down?

Down for athletic socks (compression keeps them in place). Up for dress and merino socks (better drape, no toe pressure).

How often should I replace socks?

Athletic socks: every 6 months. Dress socks: when the heel/toe thins. Wool/merino: every 1–2 years. The minute you can see your skin through the heel = retire.

Best socks for sweaty feet?

Merino wool (Smartwool, Darn Tough). It regulates temperature + wicks moisture better than synthetics. Counterintuitive — wool is best for HOT feet too.