I have a poster I'd like to put up which is about 5cm longer in its longest dimension than A1, hence doesn't fit an A1 size clip frame, and can't be trimmed to fit without wrecking the picture. Does anyone know where I might find clip frames in non-standard (i.e. not A1, A2, ect) sizes?
The reason I thought of a clip frame for it, rather than just sticking it up with blu-tack, is that the wall I want to hang it on can't take blu-tack. Any other ways of hanging a poster that I haven't thought of?