
But I'm framing two photograph portraits in a dark flat oak frame with a width of 35mm and the widow-mount is Daler Rust which is also going to be 35mm (actual width 40mm but 35mm visible). It looks ok to me and me thinks if it looks ok then it is ok

Customer doesn't want a bigger mount as this will make the frames too big. Just wondered what others think about the relationship between frame width and window-mount width? As I say, the mount can't be bigger but I could make them smaller by maybe 10mm?