Mittens shouldn’t be too loose or too tight. Your mittens should have about a 1/4-inch of space above your fingertips, and you should be able to make a fist comfortably without too much constraint or too much extra fabric.
Having a mitten that isn’t too loose or big and spacious is ideal, because that extra space and air requires body heat to warm.
If your mittens are slightly roomy, try wearing a thin, lightweight liner underneath. If your mittens are too tight, they will be annoying to get on and off and pose the risk of cutting off circulation at your wrists.
With attentive care, good mittens can last many seasons; (photo/Jason Hummel)