1

Can you guys open this .stl file to see the size?

https://www.dropbox.com/s/x1da3jsivm8lqvb/HEAD%20STRAP.stl?dl=0

Are they 180 x 230 x 30mm for you? For me, it is 10% of the size when I open the file by Simplify 3D or www.viewstl.com.

2

its coming small, you need to scale it by 10x.
you made it in which software