In this quilt you need nine 14" squares. 

Need rulers?  Here are some sets:

• Magicfly 4 Pack
• Quilt In A Day 16"
• June Tailor T-Shirt Transformation Ruler

Need Fusible Interfacing?  Here is what they all used:

June Tailor T-shirt Project Fusible Interfacing

Now for the marker/pen for use with the T-Shirt Transformation Ruler:

• Clover 4710 Pen Style Chaco Liner Blue
• Pen Refill

Lastly, to protect the T-Shirt while ironing it you'll need a pressing cloth.

• June Taylor Pressing Cloth, 16"x16", White

Here are some example using the June Taylor ruler.  Quilt and Pillow!

You can really do these projects with any ruler.  Any size.  

Here's another version of the same project.