Customized version of https://www.thingiverse.com/thing:3528335

Created with Customizer! https://www.thingiverse.com/apps/customizer/run?thing_id=3528335

Using the following options:

line_1_text = Oxford
line_1_size = 6
line_2_text = R
line_2_size = 6
text_language = en
fontname = DejaVu Sans
total_diameter = 36
hole_diameter = 5
hole_distance = 3
border_width = 1
number_of_text_layers = 3
number_of_base_layers = 5
first_layer_height = 0.15
normal_layer_height = 0.15