I personally find 34 quite big. I'm 1.65m. I use 30. 34 is bigger than Luggage because of the thick base. I suggest you try on both size before making the choice if both sizes are offered to you. Look forward to your sharing!
I am short 1.58 I use 34. Love its capacity, I carry scarf n cardigan too. Personally I like to 手挽 more, and I like the cover to slightly saddle like a 馬𩣑。 for me, if its 30 and I stuff it too much, it will look like a box and I don\'t like it. But it\'s just personal, most jm think 34 is too big