Anna? I have a deep and abiding personal relationship with that pair of shoes, in the black/nude. I visit them at the shoe store around the block every couple of weeks. I think about them while daydreaming at work. They are unspeakably amazing. Can you please take lots of pictures when they get there and tell me how the sizing runs? I would be eternally grateful.
(That said, 2.75" is right on the border of being a high heel for me. 2-2.5" tends to not really feel high-high, and anything under 2" I can basically treat as a flat for all intents and purposes. And this is coming from someone who tends to max out at 3.75" and really more like 3.5".)