So the last days I tried to find a model which would best fit to her, so that you are able to get a feeling what she looked like
and I think I found some that could explain her body in the best way.
So she is slightly a mix of Bea Flora and Ewa Sonnet (I was happy to find a pic with both of them side by side, even if this is not an actual pic of them),
the waitress has slightly the same body as Bea but not that tall, I would guess her to be 160-165cm tall, with the similar round face like Ewa has and the boobs a bit smaller than Bea, more in the size of Ewa, so maybe at an E/F-Cup. But it is difficult to figure, cause she wears a black shirt and a bra and a comparison between real people and a picture might leak in accuracy.