Start by cutting the arms off. Then accross the shoulders and down the sides. Use the seams as guides.
Next make the front and the back pieces into rectangle shapes. You can also use the arms if you open them up.
If making one small cushion from the front piece, fold in half and pin in place your applique. make sure you dont pin it to the back of the cushion
If using the front of the jumper as the front of a big cushion pin applique in place.
Ignore the cream fabric around my applique this is where i cut it from the old cushion i had made before.
Go slow so you keep it neat.
Again there is extra cream fabric on mine as i did not want to cut too near my dog design. I tucked this in as i sewed along. You wont have this.
Fold or place fabric right sides together to make your cushion. machine a zig zag stitch half inch from edge around 3 sides twice for extra strength. The zig zag stitch helps with the stretch on the wool.