This versatile unit can be made in many different ways. Here are links to instructions to help you find the method that works best for you.
For our swap blocks, you will need to make 3" finished units (3.5" unfinished).
The basics: Cut 3-7/8" squares
Cut squares at 4" and trim to size
Bonnie Hunter's directions for using the Easy Angle ruler (start with a 3.5" strip)
Magic 8 - make 8 units at a time
Nancy's Notions video demonstration of tiger tape
Instructions for how to use Thangles