I purchased several shampoo bars from Queen Charlotte Soaps in mid-January. I was curious how long these things would last, and I can tell you, they have far exceeded my expectations. After over 4 months of daily use, the bar of Cedarwood Rosemary is finally biting the dust. I have fairly short hair, and when I shampoo I lather up and rinse - once; so those who have longer hair or lather/rinse more than once may not get quite the longevity I've enjoyed from this bar. I may be able to squeeze a couple of more days out of it, and it's a little sad, but I have a bar of Lemon Bergamot waiting in the wings!