15th December 2008: I wanted a sturdy bodice with a floaty skirt.
From the very beginning I saw the skirt as white satin shining through a blue chiffon overlay. I just couldn't visualise it as a white sheen on blue satin, it seemed too harsh for the character. I managed to find the perfect Caribbean blue chiffon in Shepherds Bush and also a soft, floaty, white satin-esque fabric which actually has a striped texture to it (and very cheap).
The skirt is a fuller-than-circle skirt, maths tells me it's 10-11 metres round the hem. I used such soft, draping fabric, it hangs deceptively flat, which is perfect for dancing :)
The bodice is left over black satin and after failing to find the darker blue for the front panel in a satin I went with overlaying a crinkle chiffon on the black. This turned out to be even better as having the same fabric for the whole base made shaping the bodice easier. The white sections were going to be plain white satin, but when I saw one with butterfly patterns weaved into the fabric I just had to use it even if it was flimsy and frayed like crazy (interfacing solves all).
This costume is the reason I got an overlocker; I couldn't have managed the chiffons and butterfly satin without it, they would have frayed into nothingness and left me trailing threads round the ballroom.