☆ Kaisa graph paper with 4x4 quad ruled, each page is divided into 4 squares per inch, loose-leaf paper for office and study use. Proudly made in the USA with high quality. ☆ Standard size: graph ruled loose leaf paper150 sheets per pack, total 450 sheets filler papers, each page is divided into 4 squares per inch, suitable for engineering projects, architectural design.10.5x8 inch letter sized and 3-hole punched to fit standard ring binders & pocket folders with fasteners. ☆ Cost-effective: Sold in bulk quantities, which can save money and reduce the need for frequent reordering, making it a budget-friendly option for students or anyone who needs to take notes regularly. ☆ KAISA notebook paper is smooth paper that does not bleed ink. The college ruled lined paper is thick enough that the ink does not blot. The notebook paper are the standard basic loose leaf paper for keeping notes. ☆ Margin line: loose leaf papers have a margin line, which is a vertical line on the left-hand side of each page that separates the writing area from the margin. ☆ Double-sided pages: The lined paper was double-sided printed, allowing you to use both sides of the paper before having to flip to a new sheet. Suitable for college and professional use. Kaisa 4x4 Graph Paper Loose Leaf 500 Sheets 8x10.5 Graph Ruled Notebook Paper 1/4inch Grid Paper Lined Paper Filler Paper for 3-Ring Binder Paper 3-Hole Punched Math Paper(450sheets 1/4 graph Paper)