So you've designed or bought yourself a 3D printed ring from Shapeways but you also need a small container for your ring. Why not also get a 3D printed jewelry ring holder for storage or presentation purposes?
"The Ringmaster Small Hearts" is a heart patterned container with a centrally located screw mechanism to attach the cover to the container. The screw mechanism is based on the always-popular and proven stamp roll holder design also available in this store. The diameter of the central post is set at 0.5 inches (12.7 mm) which means ring sizes of approximately 1.75 or larger can fit in this container. The larger inside dimension of the container is 1.4 inches (35 mm) centered on the central post. This means your ring may have a maximum thickness of 0.45 inches (11.4 mm) as measured radially from the inside to the outside extremes of the ring. The inside height of the container is a maximum of 0.59 inches (14.9 mm) except at the very edge where it is 0.55 inches (13.9 mm) due to a small alignment ring in the cover used to provide a secure and snug fit when the cover is fully screwed in.
I would recommend lining the inside of your container with cotton, felt, fabric, or other soft material to prevent any scratching or abrasion of your ring while it is in the container during transport just to be safe. The lid will also screw into the bottom of the container to keep the lid from getting misplaced or lost.