How do they fit? EVERGOODS CIVIC ACCESS POUCH 1L & Pocket Notebooks

不知道怎麼選擇，所以買了一些來比較看看，希望能幫各位省點錢。
Didn't know how to choose from them, bought all of them and tested them out. Sharing the comparison hoping you can save some money.
比較常見隨身筆記本尺寸
Sizes compared
A5
A6
Traveler's notebook standard
Traveler's notebook pocket
Field Notes
Traveler's notebook passport