How to make this round tower bigger?

I like the cleanness of flat bricks (ok ok they are round, but un-textured). Other tutorials I have found use techniques with lots of texture, of tiles. But I like the clean look of the bricks above way better. However the circle is too small. Anyone have any idea how to make a bigger yet still round tower? submitted by /u/N3rdyandIknowit [link] [comments]