Each label link is nested inside a span tag followed by a class named label-size. If the font-size is not specified the widget changes font-size of each label according to its post-count. Therefore showing big and small clouds. Introducing custom styles would over-ride the existing styles thus changing the entire look.
Steps to Implement
The code below can be customized in several ways to create exciting label designs.
Step 1: Go to Blogger>Settings>Layout
Step 2:
Click add a gadget and choose Labels
Step 3: Now inside the settings make sure you choose Cloud Display option
See the screenshot below as an example
Step 4: Now save the template and back it up somewhere
Step 5: Now go to Blogger>Settings>Template
Step 6: Now click on Edit HTML
Step 6: Now click on Edit HTML
See the screenshot below as an example
Step 8: Now paste the following code just above it
Step 9: Now save your templateStep 10: All done, Enjoy!