Fabric measurements for DIY Card Box

Hi everyone! I'm going to be making a 3-tiered card box and covering it with fabric. The fabric I'm ordering is a little pricey, so I don't want to over-order. I want to figure out how many yards I would need to cover the boxes in the link below. I think 2 yards should do it. Thoughts? Thanks in advance!!


http://weddingshop.theknot.com/the-knot-nesting-box-set-blue-dot.aspx