DIY Mini Harry Potter Hogwart House Cross Stitch Badge Charts from Alicia Sivert. These Hogwart House badges are tiny and if you have never cross stitched before this is an absolute beginner project. You can find the plain “H” badge (lower left corner) here. For more unique Harry Potter DIYs check out unicornhatparty.com/tagged/harry-potter and truebluemeandyou.tumblr.com/tagged/harry-potter

For more elaborate patches there are these DIY Cross Stitch Charts for Hogwart Houses by Ronjaliek on Deviantart here.