4.5 Inch Rulers - 72 Pieces by CarnivalSource.com! This stencil ruler is a fun addition to your school supplies. Each piece contains a ruler and stencil for creating a work of art. 72 pieces per pack. Find more great items like this in our School Supplies Miscellaneous category here at CarnivalSource.com. This bulk pack of 4.5 Inch Rulers is perfect for classrooms and art projects! Each ruler is made of hard plastic and measures 4 1/4 inches Long Assorted colors are included, so you can always find the right one. Plus, they ship from our Missouri warehouse within one business day. Perfect for school supplies, craft projects, and more!