Head Graphene Instinct Rev Tennis Racquet 4-1/4 Ultra light and ultra maneuverable, the Instinct Rev is an excellent choice for juniors or any player looking for a lightweight easy to swing racquet with good stability and feel. Head Size: 100 sq. inches / 64 sq. cm Length: 27 inches Unstrung Weight: 8.6 oz. / 245 grams / Strung Weight: 9.1 oz. / 260 grams String Pattern: 16 x 19. Racquet is strung and ready to use. No cover included.