A rather strange requirement was mailed to me. The dimension of
115 cm × 145 cm
should be applied for a poster. According to various defined paper sizes, that's not a standard as far as I saw. Anyway, can you recommend any packages concerning this circumstance?
geometrypackage to set your page size, develop the layout in normal font size, and then use a\scalebox(of thegraphicxpackage) on that layout to scale the layout to the proper size. As far as poster layout, I'm sure there are packages. If none suit, you can build your own like here http://tex.stackexchange.com/questions/122062/placing-textblock-or-equivalent-in-same-seperation/122073#122073 – Steven B. Segletes Nov 07 '13 at 14:00