Your prescription is so strong. I highly suggest you to choose smaller lenses, since your spherical part of your prescription is minus (-). These lenses are thinner in the middle and thicker on the edges. So the smaller is the lens, the thinner is the edge. In this case, the smaller frames are more elegant and the lenses are thinner. Beside, it is better for you to choose high index lenses, 1.60, 1.67 or 1.74 index lenses would be a good choice. However, they are much expensive. These high index lenses with thinner edges. Even though you choose bigger frame with large lenses, it will not as thick as the lower index lenses.