A moon tattoo automatically looks compact on the finger. That is precisely why line width, position, and orientation have such a strong impact on the look.
Where on the finger?
On the side, the design looks more discreet; on top of the finger, it is much more prominent.
Compare first
Test both placements first before committing to one position long-term.
Share:
Dandelion wrist tattoo: delicate placement
Butterfly Shoulder Tattoo: Size and Placement