In the Dimension Other PropertyManager, you can specify the display of dimensions.
To open this PropertyManager:
Select one or more dimensions, then click Other in the Dimension PropertyManager.
If you select multiple dimensions, only the properties that apply to all the selected dimensions are available.
Override Units
Overrides the document's units defined in Document Properties  Units. Specify the unit type for the selected dimension.
The available options depend on the type of dimensions that you selected. For example, an
Angular Unit can be
Degrees,
Deg/Min,
Deg/Min/Sec, or
Radians.

The mm suffix was appended to the dimension text manually. 
Decimal
Rounding method 
Use document method 
Uses decimal rounding method specified in Decimal rounding in Document Properties  Units. 

Round half away from zero 
Rounding method where 5 rounds the previous digit up. For example, 46.15 at one decimal place becomes 46.2. 

Round half towards zero 
Rounding method where 5 keeps the previous digit unchanged. For example, 46.15 at one decimal place becomes 46.1. 

Round half to even 
Rounding method where 5 is the removed digit. When the previous digit is even, the digit remains unchanged. For
example, 46.25 at one decimal place becomes 46.2. When the
previous digit is odd, the digit is rounded up to the next even
number. This method is also referred to as Statistician's
Rounding. For example, 46.15 at one decimal place becomes
46.2. 

Truncate without rounding 
Method that removes digits without rounding. For example, 46.19 at one decimal place becomes 46.1. 
Fractions

Denominator 
Displays the dimension as a fraction with the denominator value, if possible. 

Round to nearest fraction 
Rounds the dimension and displays the dimension as a fraction with the denominator value. 
Text Fonts
Dimension font 
Specifies the font used for the dimension. Either select Use document font, as defined in Document Properties  Dimensions, or clear this check box and click Font to select a new font type, style, and size for the selected items. For details, see Choose Font. 
Tolerance font 
Specified the font used for the tolerance dimension. Select Use dimension font to use the same font as for dimensions. Clear Use dimension font to specify Font scale or Font height. 
Fit tolerance font (For Fit tolerance types only.) 
Select Use dimension font to use the same font as for dimensions. Clear Use dimension font to specify Font scale or Font height. 
Options
Read only 

Driven 
Specifies that the dimension is driven by other dimensions and conditions, and cannot be changed. 
Routing
Available for SOLIDWORKS Routing. See SOLIDWORKS Routing Help for more information.
Use centerline dimension 
Calculates the distance from the centerline. 
Include covering thickness 
 When selected, calculates the offset distance from the outer surface of the covering.
 When cleared, calculates the distance from the outer surface of the pipe. The covering thickness is ignored.

Layer
In drawings with named layers, select a layer for the selected dimension.