[ethbr0]

I flew most domestic US when I was in the air, and rarely did I need more than under-seat sized.

If you have a garment bag, I suppose that's a consideration, but I remember there always being "lay on top" free space in the overheads, even if full of bags.

[midasuni]

How long were you away? I’ll fit a couple of weeks in my standard bag easilly, plus electronics etc. In my under seat sized bag I’d only really get 3 days worth.

Besides you can’t put stuff under seat in the exit row.

[ethbr0]

Usually M-F, but it was consulting-developer formal, not suit and tie. So probably more compact than what's usually needed for a client.