Are your icons too small? Or too big? This setting will let you resize them to suit your desktop preference.

Open your registry and find the key below.

Create a new value named 'Shell Icon Size' and set the value, or modify the existing value, to equal the size of your icons in pixels. Smaller values = smaller icons!

Settings:
User Key: [HKEY_CURRENT_USER\Control Panel\Desktop\WindowMetrics]
Name: Shell Icon Size
Type: REG_SZ (String Value)
Value: Size in Pixels (Default = 32)