I have the 12.9 " Pro.  After trying and returning the Apple Smart Keyboard twice, I decided to stick with the Apple Magic Keyboard which I love.  But I needed a good solution to transport the IPad and keyboard so I just picked up the Waterfield Designs sleeve case. The Magic keyboard fits perfectly in the outside pocket and it even has a little pocket for the Apple Pencil.  I like the versatility of the external keyboard plus I love typing on the huge onscreen keyboard as well..... 
https://www.sfbags.com/collections/ipad-cases/products/ipad-sleevecase
	
		
			
		
		
	
				
			https://www.sfbags.com/collections/ipad-cases/products/ipad-sleevecase
 
 
		 
			 
			