Is it possible to gain inches?

On my hips, legs and calves?

I'm a 33" in hips, legs are 19" and calves 12" ...As you can see, my legs are twigs (I'm 5'6 and weigh 108lbs due to high metabolism). I would love to gain 3-5 inches around my legs THE HEALTHY way within 6 months. Is that possible?

Thank you!
 
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