TOPS Lab Notebook, 10 x 7 3/8 Inches, Hard Marble Cover, Quadrille Ruled, 5 Squares per Inch, 60 Sheets, White, (35128) Lab book is ideal for lab work and documenting results Stiff black graphite cover protects pages Cased-in construction lies flat for easy writing and copying 5 squares per inch Page size 10 x 7 3/8 inches