This size will generally last me 2 to 4 weeks, depending on how often I use it. My gripe with this formula is that it is very heavily scented. Although the scent is supposed to be light and fresh, my nose picks up an almost minty scent. The spray can applicator top does not give you a fine mist.
This is a very basic dry shampoo. The performance of this dry shampoo is very lackluster. Although it is supposed to absorb the oil in your hair to refresh it so you can go more days without washing your hair, this product does not necessarily do the job very well. I currently am using the travel size, and it is 35ml. It's a very forceful and heavy mist. This feels almost sticky in my hair. This does not do a very good job of keeping my hair clean enough for at least one more day of not washing it. This is not a product that I would repurchase, nor is it a product that I would recommend. I definitely believe that with so many other different dry shampoos on the market, this one definitely misses the mark and could do better.