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Product Description
Inside diameter modelled at 20.55 which should print to 19.55mm or *very* slightly larger.
See my other GL rings in different sizes:
https://www.shapeways.com/model/331435/green_lantern_ring_9_5.html?gid=ug
https://www.shapeways.com/model/318330/green_lantern_ring_16_8mm.html?gid=ug
https://www.shapeways.com/model/310333/green_lantern_ring_size_12.html?gid=ug
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