To find the right fit, you'll need to use flexible measuring tape to get a few hand measurements.
To find your knuckle circumference, wrap your measuring tape around the part of your hand where your fingers meet your palm. This is typically the widest part of your hand -- right at the knuckles.
Your hand length is simply the length of your hand. Use the measuring tape to measure from the tip of your middle finger to the end of your palm, or the point where your palm meets your wrist.
Most websites or manufacturers use these two measurements to determine glove and mitten sizes. Once you have these measurements, simply hop online and check to see what size is best for you. Sizing can vary from brand to brand, so be sure to use the sizing chart specific to the pair of gloves or mittens you are considering.
Heather of Just a Colorado Gal does a great job demonstrating these measurements. Hit play on the video below to watch.