This is a size 7 calligraphy brush. I accidentally bought the wrong size, so I'm selling it. The brush itself is in good condition. Bristle length: Approximately 4.5cm Handle length: Approximately 19cm Handle thickness (diameter): Approximately 1.1cm This is a slightly medium to large-sized brush. I think it can be used for painting, calligraphy, pottery, etc. ^ ^ Thank you for looking.