How much does one ounce way?

First of all, I would suggest that you invest in an inexpensive scale. But for the time being, one slice of Nature's Own Whole Wheat bread (or pretty much any sliced sandwich bread) is about 1 oz. One slice of cheese, e.g., Kraft singles is supposed to weigh an ounce. I have found that one slice of deli cheese is pretty close to one ounce, though.

1/8 cup of water or dip. this is the same as 2 tbsp. I dont know if this will apply to you, but for me that serving is about the same size as a tightly wadded piece of paper or both of my thumbs put together.