I like the idea of several of the offerings here, suggesting there is a MoD standard as well as US Military. I'm attending a Black Tie banquet here in Fort Collins in a couple of weeks and my rack of miniature ribbons is too large to fit within the width of the lapel so it is necessary for me to adopt the US standard. Over the pocket. I don't expect to be the only person so attired.

I've seen several Scot's (in Edinburgh) wearing their medals on suits and they are over the left pocket - very large. Apparently the UK MoD doesn't go in for miniature?