Head Ash Barty Jr. 21With its colorful, vibrant design, the 21 inch Barty 21 TENNIS RACQUET is ideal for girls aged between 4 and 6 who are new to tennis. Named after HEAD ambassador Ash Barty, this racquet comes with the Damp+ insert, which reduces vibration. Named after Ash Barty Colorful design Damp+ insert reduces vibration Weight (unstrung) 180 g 6. 3 oz String Pattern 16 17 Head size 520 cm 81 in Grip size 000, 0000 Balance 255 mm 0. 5 in HL Length 535 mm 21 in Beam