Truly long spaghetti
I imagine you are thinking of spaghetti curvati (o spaghetti con curva, that is, spaghetti with a bend).

It is a pasta format typical of Southern Italy.

Some brands refer to those as spaghetti lunghi (long spaghetti).

I am not aware of a specific name for them, although I am fairly sure there are names in various Italian dialects.