Before You Begin
For the best measurements, you'll need to use a hard ruler to measure foot length and a soft tape measure for the foot circumference. Also, it's good to take measurements early in the day because activity and warm temperatures can cause feet to swell a bit.
Measuring Your Foot for Knit SocksFoot length should always be measured with a hard ruler. Place your heel and the end of the ruler against a wall. Measure length from the back of the heel to the end of your longest toe. Be careful not to bear weight on the foot being measured or your foot will lengthen and spread.
Measure your foot circumference with a tape measure. Set your foot on the floor with the tape measure around the widest part of the foot. Remember not to squeeze the tape measure too tightly.
Don't forget to measure both feet. They may not be the same size.
See it in Action
Negative EaseSocks fit best when they are snug around your foot. Designers call this negative ease and it just means that the finished sock measurements should be slightly smaller than your actual foot measurements. How much smaller is up to you, but a good rule of thumb is to knit your socks 5-10% smaller than your foot.
To calculate 5% negative ease, multiply your foot measurements by 0.95 so your sock will be 95% the size of your foot.
Actual Foot Length = 9 1/2 inches
Sock Foot Length = 9 1/2 x 0.95 = 9 inches
Actual Foot Circumference = 8 inches
Sock Foot Circumference = 8 x 0.95 = 7 1/2 inches
After you've taken your foot measurements, you can find your next project in the Sock Knitting Section of my pattern shop.