Most RAFF.A.ELLA pieces are designed for a relaxed, effortless fit. 
Our clothing is currently made in the following sizes (Australia sizing):
S:   (best for Australian sizes 6, 8, 10)
M:  (best for Australian sizes 10, 12)
L:   (best for Australian sizes 12, 14, 16)
O/S:  one size... suits 6 - 16 
We recommend checking your measurements and then see where they fit in the below chart to help you choose a size. The size range allows for an oversized look up to a fitted look. 
(Please refer to the following as a guide only)
SMALL 60cm-100cm 60cm - 90cm 70cm-170cm
MEDIUM 70cm - 105cm 70cm - 98cm 85cm - 180cm
LARGE 80cm - 120cm 80cm - 110cm 80cm - 200cm
  *For instance, if your own measurements are: Bust 86cm / Waist 70cm / Hips 95cm - a size S will fit fine, however it will be fitted, especially at the hips. The size M will be perfect and the size L would be quite oversized.
We personally love an oversized look that allows for lots of styling of the dresses with knots, belts and tucks.
Remember, we are here to help you! So if you are unsure please feel free to message us with your measurements and we can help recommend the best size for you.