[Pansy-Mae]

Even though they stick out nicely the fullness does not seem to be there has any one got any ideas how to help this?

Hi Jenny and welcome

Bryony is quite right, its time that will bring fullness.
Take a look at an illustration of Tanner Stages and you'll see that the triangular shape is standard for the early stages.

Progesterone cream may help or, if you prefer, Microgest. Both will probably assist with filling out eventually but it will take a couple years or so - which will seem like 20!