This model was made in Morphi app in 2 steps: 1. using a cylinder as a guide, positioning the tori around it and 2. deleting the cylinder. www.morphiapp.com.
You may want to increase or decrease the size of the model depending on your wrist size. It is currently size large (3 inches in diameter).
The model is positioned for optimal printing so no support is needed.
Print our model or design your own in the app. Download Morphi for free on the App store. https://itunes.apple.com/us/app/morphi/id833530351?mt=8 Coming soon for Android.