Outside length is 7 inches
Outside Width is 5 inches.
SOLUTION
Length of outside edge = 7 inches
Scale Factor: 1in = 2.5ft
New length of outside edge = (7 * 2.5)ft
New length = 17.5ft
Width of outside edge = 5 inches
Scale Factor: 1in = 2.5ft
New width of outside edge = (5 * 2.5)ft
New Width = 12.5ft
Therefore, the new dimension of the outside edges of the frame is 17.5ft by 12.5ft