Super cute polka dress.
It's a small - a good fit for UK8s (loosely fitted) and smaller UK10s. I would say the proportions are better suited to shorter women - 5'4" and shorter. The reason is that the waist sits quite high + the sleeves are cropped. If you're tall it would just look like you're wearing a dress that shrunk in the wash :-)
Sits a few inches above the knee in length, based on a height of 5'7".
In fantastic condition except for slight pulls on the silk at the shoulders (see final photo). I have marked down the price to reflect these.