Thick Skin Grapes

As I sit at my desk, popping green grapes in my mouth, I notice that the skins don't seem to go down as smoothly as they should. When I start to pay attention to the food I am consuming, realization awakens in my senses -- the skin is too thick. While I'm not going to pull out my millimeter measuring devices and start a comparison study, I am going to go with my gut and say that this batch of grapes has extraordinarily thick skin.