This book was designed with the Creative Grids 60 Degree Triangle Ruler. If you are not using this ruler, or do not have access to this ruler, we have put together an instructional handout on how to make other rulers work. We recommend the Creative Grids Ruler as it has a flat top, and works well for cutting the half hexagons used in many of the patterns. Please click on the link below for information on how to make other rulers work.