Help with icons and toolbars

does anyone know how I can get bigger icosn like the links below.Also how can i get my my computer section like the links below.

Thanks

1) evilmnky204.deviantart DOT com/art/AquaSpecialEdition-56392599

2) ofP06o.deviantart DOT com/art/Windows-XP-Leopard-3-12-2008-79789250