i saw a trailer या some thing on tv and it shows edward and bella with a three to five yer old girl with golden brown hair. Bella was stroking her hair and edward was smailing at her. and also in the अगला scene, jacob was पढ़ना the girl a storybook the caption was " bella and edward spending time with there daughter." so guess she grows.... the girl looked like her
If you're asking for book answer: Renesme will continue growing up until she looks as 17 years old. That's thanks to her human side. After that, she will stop growing up and she'll look 17 forever. That's thanks to her vampire side. That process will happen in 6-7 years.