Be aware that changing the text size of a dimension style will change all text that uses that style.
I've messed up drawing borders etc by doing this.
I prefer to have dimensions with their own format, based on, for example, ISO standard format. You can then force all dimensions to use this format with Tools>Options>Dimension Style.
This also lets you set up different styles for Balloons, Notes, Radial Dimensions etc.
bc.
2.4GHz Core2 Quad, 4GB RAM,
Quadro FX4600.