Modernista 4050 Bright Size 10 has a brush head that measures about 8mm Wide x 13mm Long * Tadami is the synthetic version of mongoose hair, imitates its natural appearance and feel, offers good spring and an immediate response to the brushstroke, especially with acrylic and oil painting * Escoda brushes boast trademarked tripled crimped ferrule ensuring a lifetime secure fit, unique curing process that locks each hair in place creating a permanent brush shape and all wooden handles are ergonomially designed and made from the finest brich wood available * Escoda"s ISO 9001/100 Cerification ensures that each brush is engineered and hand crafted to exacting standards and is supported by Escoda"s Lifetime Guarantee against workmanship defect if purchased from an authorized dealer * Since fine art brushes are hand crafted, please expect some variation to the listed dimensions