Hi Bhavani!
The sphere is in place when you are meditating, but not as you go about your everyday life. Imagine trying to get multiple people into one room if we all had 10 foot auras!
The more you meditate, the more easily the energy will expand, but when coming back into the body it will return to its "normal" size. I do find the nature of the energies has become more refined and pure as I have advanced my meditation practice, but it feels more like a change in quality than a significant increase in quantity.
With love,
Wendy
