The Moroccanoil Blonde Perfecting Purple Shampoo comes in a 6.7 fl.oz size. This shampoo is formulated specifically for blonde or lightened hair to neutralize brassiness and enhance the brightness of blonde tones. It contains violet pigments that help to counteract yellow and orange undertones, leaving blonde hair looking cooler and more vibrant. This product is typically used to maintain and enhance blonde hair color between salon visits. If you have blonde hair and want to keep it looking fresh and free from unwanted brassiness, this purple shampoo could be a great addition to your hair care routine.