Cucumbers growing weird

I have been growing cucumbers for the past three years with great success. This year something has gone wrong on me and I was wondering if anyone has any idea what has happened.  They are all really fat and misshapen. The mini ones are all pear shaped I.e very fat at the bottom and skinnier at the top they aren't very mini either. The long ones are also getting fatter and fatter nearly round before they start putting on any length they keep the width and then get longer they look like a nuclear war head.  They taste ok but I have never seen anything this size. A single slice would make a sandwich. Can't think of the varieties but they are the same as last year which were normal

Are the leaves as you would expect?

Some might, but I personally, have no other ideas right now. Especially, if they otherwise seem fine, some genetic disorder of sorts, maybe.