Another vote for glass, there's a fabulas glass piece on dotd today and its not overly intimidating being 5.5 inch insertable. Might be worthchecking out
Then the wands offer amazing clitoral stimulation, combined with glass is in my eyes mesmerising and the perfect combination.
I guess it depends on your budget, but as Vanessa said the Tracey Cox wand would prove a good option with it having similar vibrations and the silicone material feels gorgeous on the skin. Or the desire which is rechargeable so no worry about having no batteries available.
My links aren't working (well it's most likely me missing a trick!) It may be worth having a chat with your girlfriend about what she likes in a sex toy or even browsing the site together. I'm sure it'll not be long before she's a huge wishlist! If it's a surprise, just make it a general enquiry as for her to show you the kind of toys she's into. 💟xx
P.s yummy mummy you've got to try glass, first chance you get 😄 it was the last thing I tried and haven't looked back hunni 💟xx