The guitar wall mount hangers have 3 different dimensions: 1> Guitar holder dimension is 16.5*9*5.6 cm for guitar and skateboard. 2> Ukulele stand dimension is 12.5*8*5 cm for ukulele and similar string instrument. 3> Violin wall mount hanger dimension is 13.5*5.5*4.3*2.5 cm for violin. Pls select the correct size hanger as per your demand to display your guitar/ukulele/guitar and skateboard properly and make your room clean and tidy. The instruments can be properly protected and displayed