Hi Frenchy,

how about this, in the upper right of the browser it tells you how big the radius of a given circle is. Then simply draw a new circle on the sphere surface with the same radius as the original one, were you want.

I did the following: I draw my (center) circle on the sphere were i want it, with the given size, then intrude the circle and do on both objects a "Curve" intersect command. Now i have a circle which is exact the size of a given circle, fitting on a sphere.

Regards
Stefan