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

Input:
Question: what is inside diameter
Document: Here's an American company presenting a sturdy product for a reasonable price...And its a perfect fit in my toaster oven! (It truly IS 12-inch diameter). YAY!
Was looking for a pan to fit inside my Nuwave oven and this fits great so I am happy with my purchase.
After recently purchasing a toaster oven that has a "pizza" setting, I looked for a quality pizza pan that would fit inside the oven. This pan is perfect. Definitely recommend it.
got this to fit in my toaster oven that says it fits 12" pizzas. all the other pans always had extra lip on it that made the pans over 12" this pan works great. I have a Black & Decker CTO4300W Perfect Broil Countertop Oven and fits perfect inside.
I was so happy to find this 12&#34; pizza pan for my new toaster oven. It fits perfect inside. It is a nice, heavy duty pizza pan that you can also use to heat sandwiches or french fries on. It's a positive addition for my new toaster oven.
I'm going to keep this simple. It works and fits inside the Cuisinart TOB-195 Exact Heat if anyone is wondering. The price is right. Easy to clean. I've made pizza on it 4 times. If anything comes up in the future, I will update. Otherwise, assume the best.
Bought two of these pans for use in a Waring TCO650 oven I bought for use at work. They're good quality pans, with non-stick coating on both sides; they're not super-stiff, they will bend and dent if you mistreat them, so... don't do that.However, they will NOT fit inside the Waring TCO650 oven.
I bought this pan to fit into my new toaster oven. The actual 12" overall diameter fits perfectly, and the non-stick finish makes clean-up easy, even in the dishwasher. The pan is also ideal for cooking and warming other things, like hot dogs, french fries and cheese sticks. I like it so much I bought extras.
Just ordered and used this pan in my Breville Compact oven. Fits perfectly - unlike, I may add, other pans that are supposed to be 12 inches in diameter but actually have an extra quarter or half an inch lip. In addition, this is a solid, sturdy pan, heavier than others, including the Breville I ordered for my oven, which compared to the ProBake, is like comparing a sheet of paper to a cardboard.
This pan fits perfectly inside the oven drawer, and has been used to bake other things like chicken strips, garlic bread,  and cookies.This pan cleans up so easily. I've washed it in the dishwasher and it's turned out fine. But because nothing sticks to its surface, I often wash it by hand, and it looks like new after several months of regular use.
Answer: The edge slopes down, so if you measure straight across from one side to the other, the inside size is 10inches.