Customized version of http://www.thingiverse.com/thing:63731

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=63731

Using the following options:

text_engraved = true
smoothness = 30
main_wall = 2
cs_shape = cs_ellipse
text_spacing = 1.1
text_itself = Custom Ring USA sizes
text_enabled = true
main_feature = 0.5
main_depth = 4
text_font = orbitron.dxf
text_depth = 1
text_height = 2
ring_size_us_can = 8.75
text_inside = false