This Tee is made with 95% organic cotton and 5% spandex giving it a nice elasticity.  Size down for a more fitted look like the photos (Tina wears S, Lucy wears M), or size up for a looser more casual fit. The hip measurement is taken from the bottom of the shirt which just skims the top of the hips.

The table below are the garment measurements (not body ones). 

S M L XL
Bust 104cm 108cm 114cm 120cm
Waist 96cm 100cm 106cm 112cm
Hips 100cm 104cm 110cm 116cm