[Tinkerbells]

I would think that would be determined by the rate of growth you are experiencing.

don't forget as well, that as your progression in growth, other parts of your body may accumulate/diminish in fat size content. so it may alter your perception as to what volume you have acquired.

Measurements may be the most reliable source, but also take into account the monthly cycle, water retention, etc.

Thanks for your input I have been growing since the beginning of the year, but the rate of growth had been accelerating much quicker since May. I still haven't measured for this month yet. I measure my breasts after my period has finished. My weight has always been constant, so I don't have to worry about weight being the cause of this growth. I'll keep in mind the water retention though.