Finger friendly scrollbar in GTK+

Standard GTK+ scrollbar is too small for finger, to make it bigger, you can put following code in your .gtkrc-2.0 or gtkrc file of theme.

style "big-scrolls" {
  GtkRange::stepper-size = 50
  GtkRange::slider-width = 50
}

class "GtkScrollbar" style "big-scrolls"

Please refer to http://www.roosmaa.net/index.php/2009/02/09/making-gtk-scrollbars-more-touchscreen-friendly/ too.