Personally I would start off at a size 10 curved shank and see how it shakes out.
Hook size varies by manufacturer and design.
Personally I would use a hook that is roughly the same size as the boilie.
For 10m I use a Preston PR36 size 16 or a Guru QM1 size 16.
I have some 10mm boilies iv heard are good for bream and small carp. Does anyone know the best hook size to set up for my hair rig?
Thanks
Matt