Hi kelsieann124,
Yes! My JG girls are noticeably larger than their flockmates. This holds true with my other mixed breeds that are half JG (I have a JG roo that is 13lbs and stands at over 25"). They are all very good sized. I love my jersey girls and can't get enough of them.
All, I have two half Jersey Giant baby roos (about 8 weeks old, hatched mid-January) if anyone is interested. Free to a good home. Their dad is a stunning jersey that stands at about 2 1/2 feet tall.