Borders around all cells in a range

Hi there,

I tried to Google this but to my surprise I could not find an answer that did not involve VBA!

What I'm trying to do is put top&bottom borders on ALL cells in a range, not just the margins of the selected area. See spreadsheet below for explanation if required.
Surely there must be a way to do this through Excel menu, tools and whatever.

Alternatively, this could be solved if I knew how to select all rows in a spreadsheet (not Select All), because if I select rows one by one it will obviously apply the borders correctly. Is there a way to select multiple rows then?

Thanks!