5 oz. | Our bath bombs are made with the same non-staining organic coloring and all hypoallergenic ingredients as our Bubble Rubbles, but with more fizz and fewer bubbles. Zen has a clean, spirited scent that is a mix of sage, mint, and peppermint essential oils. Place gently into warm bath water to create the best bath time experience. Ingredients: Baking soda, citric acid, epsom salt, FDA organic certified colorant, Essential oils (sage, mint, peppermint).