its very thin, which is nice
no offense but who on Earth in general even pockets their 3DS? I mean technically size wise you could, but you'd have to have big pockets and I never see people doing it. even with the clamshell closing 3DS if you pocket it regularly its going to get gross and scraped up pretty quickly
Just personally pretty much all handhelds I've had in the past I've usually carried in a carrying case in like a bookbag or just in my hands. I mean most of the places you'd imagine people were going that they'd want this device with them to use, you'd have to think they'd probably have their purse or bookbag anyway. On the bus, school, work, whatever.
I don't think the size is a problem considering the Joycons can be removed AND who's going to complain about a bigger screen. Personally the 3DS's two smaller screens wasn't a thing I was a huge fan of.