What do you need?
-old sweater(if you do not have this you can use felt)
- sewing needle
measure and cut 3 inch's from the old jeans
flip it up side down and sew the bottom With LACE ON IT.
cut the shape you want from your sweater and sew it on(be sure to NOT sew the two sides together)
measure how much lace you need for the straps and sew it on in the inside.