Analon and Circulon bottoms tend to scratch my ceramic/glass cook top, so I put paper towels between the cookware and the cook top to prevent that from happening. I’ve done that with this insert, too. The flat, outside bottom of this insert (that would make contact with your induction element) is 6 1/2″ exactly.
https://www.amazon.com/Calphalon-Digital-Saut%C3%A9-Cooker-Stainless/dp/B07GH89F6H

