Appeal width of page with shapesheet

[longo93]

Hey i want to create a shape which is always on the same position. even if i use a a4, a3, a2 or a0 page. the height is clear what to do about that. but what can i do to appeal the size of the page ?

i need something like:

size of page * any factor = always the same position for the shape

[Yacine]

thepage!pagewidth