I have the Bosch 500 series, 30" and I have the Le Creuset braiser pan that easily fits on that.
I also have a 6-1/2 quart oval le creuset that covers a great deal of the surface.
I have a 19" cast iron griddle pan (Lodge) that works beautifully there.

We have a 13" element on our Thermador cooktop. A 12" skillet works well with it - I've seared scallops this way and the cooktop did a great job. I also have big roasters/casseroles which will fit, but haven't tried these yet. I will when it's cooler.

I'm still learning my way around the cooktop, but so far I see plenty of ways to use the different elements with their variable sizes and power.

Cheryl

My largest burner is 11", too. I have 6qt, 8qt and 12qt pots, 12" skillet, 12" straight-sided skillet, all of which go on there. They're Tramontina tri-ply clad, except the 8qt, which is Wolfgang Puck from TJ Maxx. I also have a big Oneida non-stick skillet that fits on there. I use any pot with a bottom diameter of 9" or more on that burner. I use that burner on most days. When we make Sunday "family breakfast" with hash browns, eggs and a big ham slice in three separate skillets, I wish I had two burners that size. And there are only 3 of us in our house.

Thank you, all! Feeling much better now...

Burntfingers

I have the 30" GE Profile. Biggest burner looks to be 11.5 inches. I use a big oval Le Cruset, a 15" cast iron pan, and a very large steel comal on it.

If you need new induction-compatible pans,definitely check out Marshall's and TJMaxx. They get in different European brands at a big discount, and most of them work on induction. They usually have a lot of affordable pans, including nonstick pans.

Again, thank you, GWers! And Ginny, thanks for the tip - I love "browsing" in Marshalls anyway and this gives me a legitimate excuse! Will have to look for a TJMaxx somewhere as well...