Product review (5 stars): These can be trimmed lengthwise if necessary
The lip on the countertop side is rather large so I trimmed it down with an exacto knife such that both sides were even.  I have very little gap between the stove and counter so the additional coverage was not necessary for my situation.  So far they have been easy to clean and have stayed white and seem self-sealing.  I would purchase these again.  This is not a biased review.  I received nothing discounted or free.  If I could do 4.5 stars I would since I do wish they were slightly longer.