Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: What is the diameter of the wheel?
Document: We had two pizza cutters that were both over 5 years old, that this replaced. We typically eat at least 1 pizza a week in our household, so it gets a fair amount of use. The one cutter we had was about an inch smaller diameter wheel and required a lot more effort to cut through pizza (this is about 4"). The other had some special coating on it that had worn off over the years and parts around the center bolt had begin to show rust (yuck!).
This is really a heavy duty large pizza wheel. Can handle the thickest pizza,no problem!
This is a nice and sturdy pizza wheel. It's easy to clean and the angle makes it easy to slice.
I asked my wife for a new pizza wheel, and she bought this for me. It's much better than the last one I had, and sturdy.
The OXO SteeL Pizza Wheel is a great product, very sturdy and well crafted. Works great and cuts pizza perfectly.
Works great and is very easy to grip and hold on to while using. The bigger wheel keeps the toppings and cheese more on the pizza and less on the cutting wheel.
True to its description, this pizza wheel cuts pizza, and cuts it well. Easy to use, easy to clean. Does the job, and I recommend it.
The handle has a very nice grip on it, and the wheel seems plenty sharp to do the job. I've been using this on a wooden cutting board to protect the cutting edge.
What can I say? It's a pizza wheel. It's large enough to cut well, but not so large that it won't fit in a utensil drawer. I've no complaints ont his purchase whatsoever.
This is a great buy for this pizza wheel. I like the angle and that it is stainless steel makes it even better. I am sure it will last for years to come.
Answer: 2 and 5/8 inches (or about 6.7 cm)