3.5 Ounces. Jerome Russell's Spray On Hair Color Thickener was created exclusively by Jerome Russell as the answer to thinning hair in both men and women. Hair Color Thickener, when used as directed, will effectively cover up light to medium bald spots. This product is also remarkably effective for fine and/or thinning hair, as well as for touching up gray between colorings. Your hair will look fuller, and you'll feel as wonderful as you look!