Product review (2 stars): Save some money and use aluminum foil.
Okay, so here is the deal.  First off, these are quite lightweight and were somewhat squished in the shipping package they arrived in.  Second, while it was not difficult to cut around to fit my stove's element - I would not consider this item to be a "universal" fit.  Third,  I, actually think using aluminum foil would be just as effective and significantly less expensive since one probably has it in the house already.  (I would use the heavy duty type.)  It was not expensive and I AM using them (why wouldn't I - I bought them) but it is unlikely that I shall reorder.