Step 1: Find a suitable sweatshirt
Next thing is to measure your waist. Take that number and divide it in half. Then measure the front of your shirt to make sure that it will fit on your bottom half.
Step 2: Some more measuring and a little cutting
Step 3: Tuck n Cut
Then cut (through all thicknesses) across the line you measured for your waist.
The whole top of the shirt should be open.
Now is a good time to try it on and see how its going to fit. Make sure the sleeves are in front of you and then pin the sides to see how it looks
Step 4: Making the pockets
Fold the 1/2in little flap in over the seam. Stitch it closed. I did mine by hand but you use a machine if you like.
Step 5: Finishing up the pockets
Fold the flaps in towards the middle over the seam you just closed.
Sew the sleeve flap onto the front of the skirt. Make sure you dont sew waist closed. you should be sewing through two layers not three.
I used a zizzag stitch to allow the knit to stretch without poping the seam.