First find a wool sweater. I found this for $3 at Volunteers of America. You might have one in your closet...I didn't because I just took 4 bags of clothes to Goodwill before Christmas. I washed the sweater in hot water and dried it on hot ...a process called felting. ( There is a link for instructions at the end of the post. ) I ended up washing and drying the remaining part of the sweater one more time after the mittens were done and it got REALLY small.....so for these mittens I would suggest washing it only once. It may vary by sweater.
Lay the sleeve out flat, with seams at either side.
Trace a pattern for your mitten. I used another mitten I own as a pattern, but you could also use your hand as a guide. You want to leave about 1/2 inch extra seam allowance.
Cut out the mitten leaving the bottom cuff intact. It just has an oval shape at this point. You will be adding the thumbs next.
I measured the size of my thumb and where it would hit on the mitten. I cut a thumb pattern out of one side of the unfinished mitten.
I had some grey fleece leftover from another project, so I cut these shapes out to use for the thumb and palm area of the mitten.
I measured the piece of fleece by laying on the mitten and cutting it to size.
I wish I would have a better picture of the next step. From one side of the unfinished mitten, I cut off the top part with the thumb pointing down. I cut out the remaining palm area where the fleece will be. (It ends up being sort of a small rectangular piece that I saved for an applique project) With right sides together, I hand stitched these pieces together using a strait back stitch. You only need to sew the top part that goes across the top width of your palm and the thumb piece at this point. Next, with right sides together, sew the bottom fleece to sweater seam (the one that goes across the bottom of your palm).
Then flip back inside out (I left the thumb still right side out but it doesn't matter) and sew your outer seam. I again used a strait back stitch.
Sew, Sew, Sew. I knotted my thread on the fleece part of the mitten because it is sturdier fabric.
This is a picture from Sister Diane of some felted wool ready for crafting.
Here is a link on Craftstylish with instructions from the very talented Diane Gilleland (AKA SisterDiane)on how to felt your own wool. She has many craft tutorials and podcasts on her blog CraftyPod. Diane is also the author of several craft books.