No sure.

If you have some very firm toys already that you enjoy, then I think that you'd be good with a glass dildo. For a trial glass toy, you could get one that would also work as a massage stone or a little display sculpture. If you don't know whether you'll like texture, a double-ended one with contrasting textures (one smooth, the other ridged or something) would be good. And go slimmer rather than larger, you can usually accommodate larger soft toys than hard toys. And go easy the first time using the dildo, I remember seeing someone post about possible bruising if you're too...enthusiastic...