I have always been a huge fan of Waterfield designs, but unfortunately on their iPad products, they have been missing the mark lately. The ultimate case they had was the Smartcase, it had leather on the side, a pocket on the front that I could fit paperwork in along with the Apple Pencil, and good protection. They discontinued it despite the fact that their customer service said there are a lot of requests.
I have the Dash Sleeve from the 10.5 that the 11" fits tight with the keyboard case. The footprint is bigger, there is also a zip pocket in the front with a slot for the pencil, but you really can't fit anything else in the pocket, its too short for any documents. It's a clumsy design when trying to remove the iPad, holding it and grabbing the pencil.
I ordered and returned the sleeve case. Nice design, offers great protection, but the single flaw which they stated was normal is the slot for the Apple Pencil is very loose with no grip. So every time you pull the iPad out, the Pencil falls out.
I hate talking bad about Waterfield, I have owned a lot of their products over the years, and I love my Bolt Briefcase, but I am hoping they improve on their mobile products.
In the end, I ended up ordering a Pack & Smooch Hampshire Case. It's made of Merino Wool with a leather bottom portion for holding. My iPad Pro with Keyboard fits perfect inside. Its got a great Pencil holder with a leather accent that doesn't and won't slide out accidentally, and a pocket that is big enough to hold documents. Its flap closes securely with magnet buttons that are strong enough to keep it closed when in transport, and weak enough that it is not difficult to open to access the iPad. It ships from German, I bought it through Amazon, and it took 1 week.
Heres the link:
https://www.amazon.com/gp/product/B07K5B67YD/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1