That is amazingly tiny.
Goodness, I dont know how small an American penny is, but if it is like the English ones, then that is very very small! I grow Climbing Cecile Brunner, but your Magic Wand makes its blooms look huge!
The American penny is exactly 3/4" across, so that makes that flower about 1/4" inch across! Yup, thats tiny!
I love the interesting symmetry of the arrangement of petals on this rose, Paul. Congratulations.