Briefcase containing drawing board/drawing tools
Multi-purpose bag can hold drawing tools, drawing board 
Size: A3 - A2
Yes  Handle and strap can be adjusted in length
Thick PE coated fabric inside the bag, waterproof
The outside has pockets for pencils, brushes, pens, erasers, etc.
Machined in Vietnam, seams are sturdy, can be used for a long time without falling apart