Word uses 'points' as its default measurement units. There are 72 Points in an Inch.
The LineSpacingRule is the setting in the dropdown that you see in the Paragraph dialog. The computer stores the chosen option as numbers rather than text and so that it what it is returning when your macro queries this setting. You can experiment with the paragraph formatting and examine the macro results to work out what the '5' is indicating. It will be one of the following options:
- Single
- 1.5 Lines
- Double
- At Least
- Exactly
- Multiple
There is a reasonable chance that 5 aligns with the sixth item in this list since Word's values for LineSpacingRule most likely start with zero.