This item is originally priced at 8,100 yen. The brush head diameter is approximately 9mm to 1cm. The brush head length is approximately 5.3cm, so I believe it's a size 4-5. It is a new, unused item. Regarding the condition: There are traces of the price sticker having been removed. Also, the plastic bag is torn, and the bottom part has been taped, so please understand this. There are also multiple items available. Please inquire if you are interested. I have many other items for sale, so please take a look. Bulk purchases are also welcome. #Calligraphy #InkPainting #JapanesePainting #Brush #Nisseido