A round robin is were you piece a center square. Our needed to be between 12" and 24". The we were divided into groups of 4 ladies. Each person take another ladies quilt block(s) and adds a border. We were not able to see our center unitl the end. The size of the borders and what to do on each border is set by each group. On this one the first border finished 2" and was sewers choice. The second border finished 4" and was sewers choice. The final border was all sewers choice.