Start by cutting out your vinyl. I found this circular Batman sign on Cricut Craft Room. I just stretched it to make it more like the traditional emblem.

Then I cut it out of iron-on vinyl. If you’ve never used iron-on vinyl before check out my post on how to use iron-on vinyl.

Once you have your cut outs you can remove the negative space and position them on the shirt and iron.

Cut your cape fabric and finish the edges. I just sewed a rolled edge on my serger but you could also just take a narrow hem.

Next I pleated the two top edges so that it would come in towards the shoulder.

Stitch a line around the pleats to hold them in place.

On the second pleat mark your button-hole and sew.

Sew your buttons onto your shoulders and attach your cape.