This is a fully parametric pet collar that has customized text printed on the outside. Being circular, much text can fit. Measure your pet's neck with a string, add some slack, divide by pi , divide this by two, and enter this as the radius. I am starting with r=37 for my cat. Add your pet's name, your address, and phone number to keep your pet safe! The latch mechanism is in test now (shove the wedge in place). Otherwise, you can use a plastic tie to secure the end. If you do not have scad, I recommend downloading it (openscad). Then open this scad file and press f6! It will render, then you can download the STL. Often the customizer on this website is down, getting this program is the sure way.