Enumeration AcDbPlotStdScaleType

1:1

1:10

1:100

1/128" = 1'-0"

1:16

1/16" = 1'-0"

1:2

1:20

1/2" = 1'-0"

1:30

1/32" = 1'-0"

1:4

1:40

1/4" = 1'-0"

1:5

1:50

1/64" = 1'-0"

1:8

1/8" = 1'-0"

10:1

100:1

1000:1

1 1/2" = 1'-0"

1'-0" = 1'-0"

1" = 1'-0"

2:1

3/16" = 1'-0"

3/32" = 1'-0"

3/4" = 1'-0"

3/8" = 1'-0"

3" = 1'-0"

4:1

6" = 1'-0"

8:1

Scale to fit the printable area.