Is your phone too big? Just slip on this silicon thumb!

As smartphone screens grow in size, so too must our thumbs. But until humans start mutating super-thumbs, this gizmo from Japan is the next best thing!

Human thumbs are just too stumpy to navigate bigger-than-ever smartphone screens, but a Japanese gadget maker has a solution a thumb extender. Enter Japan-based Thanko that is hawking a silicone-based device called the "Yubi Nobiiru" (meaning "stretched finger").