How to Add Labels Cloud to Blogger
Blogger introduced a new feature. It’s called Labels Cloud. Now you don't need to find for hack and JavaScript to add labels cloud to blogger. All you have to do is go to Design > Page elements and add a Labels gadget and check the Cloud option.
Now while adding it, select the “cloud” option.
A label will appear bigger if it has more posts tagged under that label and will appear smaller if it has less posts, more like a cloud of labels.
Try it in Blogger.