I just picked up my 13” M4 iPad Pro. I gave other models a try at the store, and let me tell you…these things are THIN! I was shocked when I saw the 11” and I can’t wait to open my 13”.
If I wasn’t using it for work as much as I am, I would definitely get the 11” with the Magic Keyboard (which also feels amazing, by the way. The aluminium palm rest is much nicer than plastic/rubber). It reminded me of my favorite portable setup which was the 11” Macbook Air around 2011-2012. Really great new iPads.