A pedestal lav is almost mandatory in a bath so small. I'd also consider mirroring the whole wall to visually maximize the space. Use over the mirror cove lighting or wall pendants, not ceiling lighting. And keep wall and floor colors light to bounce the light around.

if you want a little storage you can go with a 'bongo drum' kind of vanity. we did ours with 1" mosaic tile behind it floor to ceiling.

ronbow leonie vanity

I have small bathrooms and a pedestal sink will keep your bathroom from looking too cramped and crowded. If you need bathroom storage, you could always put a wall cabinet up. That's what we have done in both of our bathrooms. The wall cabinets are hung up over the toilets.