how to explain my dentist I prefer the veneers be the size and shape as my original teeth? Don't they have to look as temporary teeth that now placed look like my original teeth. I am doing the veneers to change the colour as old teeth were canal treated and dark. Please advise if the dentist is placing bigger veneers to hide dark teeth? Is there other means to elaborate so that darker teeth is not over showing the veneer at the same time the teeth do not lose translucency and look my original teeth size?