The Hello Cup XS is suited mostly for teenagers and petite users or those who prefer a 'mini' tampon.
The Hello Cup is:
The diameter of the XS is 38mm and the overall length including the toggle is 57mm. It holds 17.5ml (to the holes) - this is more than tampons.
To help determine your size, you can take a size quiz here.
The colour of the XS Hello Cup is Lilac.