all hobs have a minimum induction base size requirement and this can be found in your hob manual. as a cookware manufacturer, we manufacture to the set industry standards. Induction works by creating a magnetic field, therefore the induction plate on the base of the pan needs to match the ring/zone size chosen on your hob in order that they make direct contact with each other and the magnetic field is created. the induction plate on the base of the pan appears as a stainless-steel plate. it is this area that needs to match the size of the ring/zone chosen not the entire base of the pan. the cooking vessel base diameter must be the same as the induction hob ring/zone chosen. if it’s too big some zones will remain outside the hob and won’t heat properly, but if it’s too small the pan may not activate the hob.