Product review (2 stars): TAKE GOOD MEASUREMENTS!
I thought I was being very careful when ordering these after I reviewed the comments left about sizing. I have a Whirlpool model that was mentioned as a proper fit. The large ones fit great but the small ones did not. The recessed part of the edge was not the correct measurement and not fit inside the small burner holes. The burners were not able to sit properly in the pans. I can verify that the quality is first rate. I haven't attempted to return them yet but I hope I can.