You may find one template like the one that I have mentioned, but you may not be happy with its other parts. So, one way to solve this is to tweak the sidebar widget distance yourself. And by tweaking, you will be able to customize your blog widgets with the right size, just enough to be put into your blog.
Here's How to Adjust Borders and Paddings of WidgetsAlways download a backup copy of your template before doing anything or use a test blog as i can not be held responsible if you mess your blog up.
As you can see, the browser has added space at the bottom of the sidebar widgets. In CSS, this space is called "margins" and "paddings" now the following CSS code is where the sidebar widgets and the main post get their margins and padding's from
Now you can play about with the margin's and padding's on your blog i hope you find this helpful and don't forget to leave your comment below. thanks