Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: how long is this knife?
Document: I bought this knife for my son who is in college getting a Culinary degree. He really likes this knife and says that it will last him a long time.
This knife is all and more! Our go to knife in the kitchen. All home cooks should have this knife.
I gave this as a gift and the person lives it. Said it's the best knife they have
Don't love this knife. I prefer a chef's-style knife where the blade tapers more.
This knife was a gift for my daughter for Christmas, she loves it. Good balance, not too heavy. She says it is perfect.
We love this knife! I bought it as a gift for my husband, and he rarely uses anything else anymore.
I love this knife! It slices with such ease and is extremely sharp (so be careful) . So glad I bought it.
I bought this knife to complete my wusthof set! Very easy to slice vegetables with and very easy to clean.
What a knife! I've never had a knife that can slice thru fresh meat as good as this one! I love it.
This knife was recommended by Ree Drummond. (The Pioneer Woman)  It is very sharp and great for slicing vegetables. Wouldn't want to be without it.
Answer: The blade is 6 1/2 inches and the entire knife is 11 1/2 inches.