Made of Cotton Lycra.
Product code: LCTOPW
They come in two sizes, but because of the wrap around style and stretchy material they fit a very big range:
SMALL / MEDIUM – UK 6 to 10 (USA 2 to 6)
MEDIUM / LARGE – UK 10 to 14 (USA 6 to 10)
For both sizes the lenght from underarm to bottom hem on the side is cm 40 / 16″.