Its a normal size superman ring with size 10.5 which actual size is 20.2mm in diameter so go on and 3d print it

And its a supercool superman logo ring you can show off in your friends, family and colleagues

it can be 3d printable just need to adjust the right dimensions according to your finger size its super easy

Steps to find finger size for ring

1.Cut a thin strip of paper or ThreadWrap the paper/Thread around your finger.Mark the spot where the paper/Thread meets

2.Measure the lenght of the thread with your ruler

3.Then use Google to convert Inches to diemeter eg. 1.96 inch = 15.85mm in diameter

4.Done! Now adjust the size in your 3d printer software and thats it.....enjoy