I agree with Holice. There are no hard and fast rules when it comes to what size or how many borders you have. The main thing I do is at least put a narrow border around the whole quilt for stability. From there anything goes. A lot of times when I do a narrow border first I'll use the background fabric so it doesn't really look like a border. One time on a baby quilt instead of putting the two sides on and then the top and the bottom I put one side, then the bottom, the next side and then the top. The border on first side and the bottom were the same color and the second side and the top borders were a different color. That one turned out pretty cool. I actually did that because I didn't have enough left of either color for borders. Do what works for the quilt.