7×5 inch photograph in a 10×8 inch acid-free mount, A4 photograph in a 16×12 inch acid-free mount, or A3 photograph in a 20×16 inch acid-free mount featuring the photograph. Chatsworth Weir and House. The photographs are attached to an acid-free backing board and are supplied in a cellophane sleeve. The example images feature an A4 photograph in a 16×12 inch mount framed and unframed. The frames are 30mm wide, have a wood grain finish, and come ready to be hung, the 10×8 inch frame has a strut back so can also be free-standing. Chatsworth House with a weir on the River Derwent in the foreground.