He's up to 7.5 lb from under 1 lb when we found him. (From 300 grams of baby to 3.5kg of kitten in only a few months, crazy.)
Here is a "before", the day my kids texted to say they found the source of the meowing I had heard before work. Just a wee handful. Always bold as anything though, he was never afraid of us or our 75lb mutt of a dog.
"I see the haughty bird taunting me at the window again. Yet, I shall not let it have the upper hand. I shall stay exactly where I am and let it know my superiority by my glare."