I'll just add to @kayb's thoughtful inventory and say that I am much less generous. Except for the nuts, where we agree, I usually dole out ~ half of the amounts specified in her post. I believe Kay also brings something in every category (appetizer, bread, salad, side, main and dessert) to pot lucks ❤️ Edited to add that I may bring more than one dish but often just one!
Kay mentions half pint or pint jars. I tend to go with the little 4 oz or half pints.
For cookies, I'd only do a full dozen of the smaller pressed cookies, otherwise a half dozen is more like it. Cookies would usually be the bulk of my baskets with several types included.
I use little foil 5 3/4" x 3 1/4" loaf pans for fruit cake and quick bread or pound cakes. I might include one fruitcake and 2 quick breads in a basket. Maybe just one in a small basket.
Not sure how I measure the nut brittles, usually a big, generous handful?
All that said, my baskets have usually gone to smaller families. Often a couple, maybe a few kids. Small treats, not sustenance.