Scale Height of Courses in Inches N: 40........ HO: 21........ S: 15........ O: 11
Scale Height and Length in Inches N: 15 x 30........ HO: 10 x 17........ S: 7 x 12........ O: 6 x 8
Scale Height and Length in Inches N: 17 x 9........ HO: 10 x 5........ S: 7 x 4........ O: 5 x 3
Scale Height and Length in Inches N: 10 x 15........ HO: 5 x 8........ S: 4 x 5........ O: 3 x 4
Scale Height and Length in Inches N: 4 x 9........ HO: 2 x 5........ S: 2 x 4........ O: 1 1/2 x 3