Are going on an extended trip but not sure how long the travel sized toiletries will last? You are in luck! I just completed a 20 day trip and kept track. Here is a general guideline:
Of course the ranges depend on how much of an item you use at one time. For example, a pea-sized portion of toothpaste is usually plenty and your tube will last much longer. People with short hair require less shampoo/conditioner than people with long hair, and not everyone needs to wash their hair every day.
With the exception of the shaving cream, mouth wash and the smaller deodorant, I took all of the above (some multiples) on the trip and they all fit in a TSA approved bag.
Have additional items that should be listed? Send them to me and I'll add them.