Alvin Engineers Field Level book is compact for on-site sketching and notes. Field notebook cover is extra stiff, has high-visibility yellow color, completely protected by a waterproof barrier with blind embossing. Pages are white ledger paper specially formulated for maximum archival service, ease of erasure, and protected by a water-resistant surface sizing. 4.625" x 7.25" page size, 80 sheets (160 pages) plus 15 pages of curve tables and practical information. Left page has blue horizontal lines, red vertical lines, 6 columns. Right page has blue horizontal lines, red vertical lines, 6 columns. Engineering note book is made in the USA.