How Much Should A 10 Week Old Kitten Weigh?

My kitten is 10 week old, she’s on the small side so I’m assuming that all cats are this way. She weighs about 2 pounds already, which is normal. But she seems to be bigger than most kittens of her age right now. Is it normal for a cat to suddenly get big? Or should I take her back to the vet and have him check her out? What does my kitten needs …