YTRYTWE Rubber Violin Bow Posture Corrector 4/4-3/4 Full Size Violin Bow Hold Stringed Instruments 1/2-1/4 Violin Bow Grip Partner Beginner

Small: 80 x 10 x 10mm/3.15 x 0.39 x 0.39". Medium: 95 x 15 x 15mm/3.74 x 0.59 x 0.59". Packages: 1PC Violin Bow Posture Corrector. Net weight: 5g4g 3g. Application: for violin. Net weight: 5g4g 3g. Small: 80 x 10 x 10mm/3.15 x 0.39 x 0.39". Material: rubber. Packages: 1PC Violin Bow Posture Corrector. Application: for violin. Medium: 95 x 15 x 15mm/3.74 x 0.59 x 0.59". Large: 100 x 15 x 15mm/3.94 x 0.59 x 0.59". Colour: Black. About the product. Flexes thumb to touch intersection of frog and stick. Supports curved pinky. Postions index finger to rest on bow. Fingers still contact bow in all the customary places. Universal Fit-for child to adult hand sizes