When it first appeared, it was A5 format. I think it is still available online in PDF format for back issues, although I forget the link. It was a great magazine.
In the coming years, I can see several amateur radio magazines going or shrinking in size. It would not surprise me if many national radio societies go to A5 format for their magazines as adverts get fewer and as a cost saving measure. It would not bother me at all is they went to A5 size.
