I have two glass dildos that are absolutely my favourite, one for vaginal use and one for anal use (but never at the same time -- I tried that once and there just isn't enough flexibility!).
Neither is exceptionally long or thick, but both are ridged and/or bumpy, which adds to the stimulation, and they can be angled to strongly caress the G-spot, cervix, or whatever else is feeling good at the moment.
(I may add pics tomorrow; atm I have a cat on my lap who must not be disturbed or she will start doing annoying things, I'm sure of it.)