iPhone XS Max
In isolation like this, the iPhone XS Max doesn't look that big. Physically, it's as big as an iPhone 8 Plus, but the display is much larger because the front of the phone is basically all screen.
Back
The XS Max comes in gold, silver, and gray. This is the gold color, which has a gold surround but a sort of beige back.
Comparison
From left, here's the iPhone 8, X, XS, and XS Max. You can see how the XS Max is bigger, and how that size gets you a lot of screen.
Bottom
There's no headphone jack, of course. The XS Max's bottom grilles are a little asymmetrical to make room for the 4x4 MIMO antennas, which improve LTE reception.
SIM
Once Apple turns on the iPhone's eSIM support, a physical SIM will be optional. You'll also be able to support two wireless subscriptions at once.
Color
The gold metal surround on the phone is very nice.
Buttons
All of the buttons on the iPhone XS Max are in the same place as on previous iPhone Plus models, but the main camera has been moved slightly because of the new antennas.