Triangles form mountains and valleys - with plenty of space left open for your own quilt style. The modern quilt design really lets you play with color to create your own mountain scene. The pattern uses a 60o triangle ruler to measure and cut the triangle pieces.  We recommend the Creative Grids® 60o Equilateral Triangle ruler. Two quilt sizes:  45in x 48in Crib Size, and 65in x 72in Lap Size