Midsize crossbody that can fit 10” tablet

I’m struggling to find a crossbody that can fit my Remarkable 2 tablet (9.75” high, 8” wide, 1/2” thick). I’m looking for something smaller than a standard work bag, that I can easily take hands-free on the subway. I’m 5’3” with very narrow shoulders, so I need something that won’t overwhelm me; a tote without a crossbody strap won’t stay on my shoulder.

I like minimalist leather bags that are structured and have a cool/architectural element. Black or brown preferred. Magnetic or zipper closure preferred. Ideally something that can dress up or down and is durable for city living. Budget up to $600.

The dream is for this thing to hold the basic keys/wallet/phone/AirPods, plus the Remarkable, a can of seltzer and a small Chicobag reusable bag (in drawstring pouch).