There is only one size for the Stripology ruler by Creative Grids. I love mine. It has 1/2" increments to cut but it also has 1/4" markings that are helpful if you need to move the ruler over 1/4". It has the grips that Creative Grids is known for. There is an outline for cutting the 10" "layer cakes" . I use it to cut 2 1/2" strips and then turn the ruler to continue to cut 2 1/2" squares quickly". I love mine.
sandy