I found this semi-mount at LOGR. The stats say the center stone should be between 6 and 6.5 mm. How does that compare to a 1 carat diamond (my only point of reference to stone size).
According to amazon a 1ct diamond is around 6.5mm.
This chart is my favorite thing for figuring out how big stones are. (I have a tendency to hold my hand up to the screen next to the size I''m looking at. I''m sure I look goof-tastic!)