This is a really detailed tutorial (written and video) for making DIY Wire Ocean Wave RIngs. For a large archive of DIY Wire Jewelry go here.
You only need a ring blank, cross stitch fabric and floss to make this DIY Cross Stitch Ring.
Other DIY Cross Stitch Jewelry
This leather DIY Shrink Plastic Diamond Ring is really easy to make. All you need is leather, shrink plastic, and ribbon clamps (or sometimes called ribbon crimps). I translated the post from Italian to English using Chrome, but the photos offer enough explanation.
I just posted these DIY Skating Zebras from You Are My Fave (with template) HERE, that are just images pasted onto cardboard. But they would look really good printed onto shrink plastic (enlarged of course because shrink plastic shrinks when heated).