Sock size and shoe size

Sep 20, 2026

Short answer: Sock sizes follow shoe sizes, but the ranges are wider. A sock in forty two to forty five fits every foot in that span, so the choice is mostly about where in the span your foot sits.

Shoe size is the starting point

Makers use shoe size because it is the number people know. Nearly everyone knows the size they wear, while few have measured their foot. That is why socks are listed in shoe sizes and not in centimetres. It keeps things simple, also when you look at a bamboo tank top for men in the same set.

Foot length is more precise

A measured foot length in centimetres is safer than a shoe size, which varies between brands. The same foot can fit two different numbers from two shoemakers. So measure your foot and use the number in the chart when it is given. That goes for socks and the rest of the wardrobe, such as a bamboo hoodie for men.

Choose the size where you sit in the middle

If your foot sits at the end of a range, the sock is either loose or tight. In the middle, heel and toe land in the right places and the knit has stretch to spare. Look at the ranges in clothing for men and pick the size where your foot is closest to the middle.

How to measure your foot

Stand on a sheet of paper with your heel against a wall. Mark the tip of the longest toe and measure from the wall to the mark. Measure both feet, since they are rarely identical, and use the larger number. Do it late in the day, when feet are usually a touch larger than in the morning.

Different feet, same sock

Most people have one foot a little longer than the other. With a wide range this is rarely a problem, because the sock covers both. If the difference sits close to the border between two sizes, choose by the larger foot. A sock slightly loose on one foot is better than one that pinches the other.

The type of shoe matters

Thin, close fitting shoes leave little room, so you quickly notice a sock that is too large and folds. In roomy boots it matters less. Think about the shoes you wear most when choosing a size, and consider using the same size for all your socks so the drawer stays easy to sort.

When you fall between two sizes

Some feet sit right on the border, at the top of one size and the bottom of the next. Then you can choose by how you want the sock to feel. The smaller size sits closer, while the larger gives a little more room. Try a pair of each before buying several of the same kind.

The fit lasts longer with the right care

Socks keep their size best when washed at a low temperature and dried without high heat. Dried hot, the knit can shrink and the size no longer fits quite right. Pair them up after washing, so you can quickly see when a pair is starting to wear.