Credit to Eric (itchyd) for the base ring model.

I altered the model to replicate the design of an unofficial Gravity Falls ring I love as the original is very cheap and turns your finger green.

I used the SVGs to cut or build the design for a ring I'm very happy with.

It's sized for my finger, roughly a US size 8, 18.1mm diameter or 57mm Circumference.

The internal cylinder hole in the current model is 19mm in diameter. If you wish to fit it to your ring size, I'd recommend scaling down the entire model until the 'Hole' cylinder is the right size for your finger.

A smaller size testing model may be advantageous to gauge how your filament shrinks and how tight you want the ring.