These are handy when you want something on your hands, but still want to be able to use your fingers. (Like unlocking your bike lock, etc.)
You will need:
Sewing machine (you could hand sew, but you would have to double do it if you wanted it to be strong).
Fabric (best if fleece or soft, i used a thick fuzzy kind.)
Step 1: Measure & Sew
You can make it as long or as short as you want, i made this pair around 2 1/2 - 3 in. long (from the thumb hole to the bottom).
Turn inside out, and then sew at the edge, don't bother about making a hole for the thumb yet.
Step 2: Cut and Tailor
Tailor the Hand Warmer to fit you hand smugly, (or you could just leave it square.)
Make sure it is big enough at the bottom to fit your hand in!
Step 3: Duplicate and Finish Up
Cut all the extra little threads and the edges of the seams that are long. Turn right-side out.
Step 4: Wear!