A family of Microsoft word processing software products for creating web, email, and print documents.
You could run the following macro, which uses brute force to increase each font size from 1 to 24 in steps of 0.5 by 0.5. It'll probably take some time to process a 130 page document.
Sub IncreaseFontsize()
Dim n As Long
Application.ScreenUpdating = False
With ActiveDocument.Content.Find
.ClearFormatting
.Replacement.ClearFormatting
.Text = ""
.Replacement.Text = ""
' 48 = twice the maximum font size to process
For n = 48 To 2 Step -1
.Font.Size = n / 2
.Replacement.Font.Size = (n + 1) / 2
.Execute Replace:=wdReplaceAll
Next n
End With
Application.ScreenUpdating = True
End Sub