Thicker: Chapter One
He didn't want to buy anything too expensive in case he had to replace it, his size changing and fluctuating regardless of how he tried to control his weight.
The Dragon's Gooey Problems
Once, it had been elemental shifting, and another time, it had been size changing. now… now it was goo stuff. this wasn’t corruption.
A walk in the park II
He's big (usually 400 pounds, with minor size changing), fully intelligent but nonanthro, predatory, often an enthusiastic rapist, and able to swallow people whole.
A Small Side-Effect
That would explain the change in heat, the size change, the weight, everything... then i noticed the sight of the arm draped over my shoulder, still that same shade of deep “charmeleon" red, if he had evolved, it'd be closer to orange—wait a second...
Sector 1404 - Chapter 2 - Off to the Unknown! The secrets of the Medallion!
From what he noticed, the young dragon seemed confused by the size change, meaning that he was not introduced to them by his father.
a new living arrangement
Having a size-changing charm on all the time needed a controller of the spell -- it was much too impractical to do it to oneself on that much of a consistent basis.
Perfume by Jenny, Part 4
At first, it was a nub, not larger than olivia's thumb, but it quickly grew in size, changing shape as it went. "natalie!" olivia gawped, shamelessly staring at her friend's genitals.
Bouncing the Bounty
Theo’s size changed a lot and there was a satisfying feeling that came from feeling the hefty meat pulsing over her tongue. they were coming from the fennec’s fat balls. they were cupped in her smooth hands, rubbed and even kneaded.
Stable Stock
The worker winced as he looked at it, knowing it had taken several size changes to reach such a massive piece. finally the blinders came off of houston’s eyes, and his massive pupils contracted as he started to blink rapidly. “ready to follow?”
Indelible, part two
James swallowed, hard, remembering the size change he'd seen in the basement. "_never_ be as big as our foxie, here," the rabbit repeated, running his finger around the slowly swelling bulge again.
Growth
A size change doesn't mean much to me, since i can still tan your hide mister! now you stay here and i'll find your bumbling father."
Turnabout
I was thinking that those in the max size range would be on top of the social order and would try to tightly control the size changing populace, even going so far as keeping them locked up unless they are needed.