I am unsure of the length. I will measure it and post it here in awhile. As far as whether they are real, I do nor have a certificate of authenticity. I'm sorry. I can only tell you that it did have one when it was given to me several years ago. But I can't say whether it was genuine or not. So, to my knowledge, these are yellow jade. But I can not swear to it. Thanks for your interest. Sorry I didn't make this more clear originally.