$61.99 Amazon.com : 12-Inch Architectural Scale Ruler (Imperial) | Laser-Etched Aluminum Triangular 
A3 Drawing Board Drafting Table Ruler Table Portable 51cm x 37cm x 0.9cm | eBay
A3 Drawing Board Drafting Table Ruler Table Portable 51cm x 37cm x 0.9cm | eBay
