small or large?

this my bike from rear as of now

and here bike ill use as an example it kind bobber look going for one on left


advice need is should i go anough rear fender for tail light and signals or anough for a bitch pad(flat piece lether for passenger)
will be going similar kind seat and fender will follow shape of seat

wont be tail light that on right now be a 1inch circle with plate bracket and turn signals be half inch on side of fender

id talk to dr.j about a custome leather peice,he doin some leather work not sure if he can do what u would like but he might be able to do somethin really sic for a back seat.maybe maybe not.

good ol CycleX...