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I just read the manga
[_travel_](https://books.google.com/books/about/Travel.html?id=g_OOMQAACAAJ)
by Yuichi Yokoyama.

What is the meaning of the A2 and A3 stickers seen on packages and documents
carried by strangers when the 3 main characters walk inside the train? A3 is
on small tubes, and A2 is on a folder and an A4-sized box, so I guess it is
not ISO 216 (paper size) though.

This manga contains zero dialogs and nearly zero text of any kind, except for
A3 and A2, which are shown prominently.

[![A3 on page
30](https://i.stack.imgur.com/PJEDgm.png)](https://i.stack.imgur.com/PJEDgl.png)
| [![A2 on page
31](https://i.stack.imgur.com/9k0Z1m.png)](https://i.stack.imgur.com/9k0Z1l.png)

Left: A3 stickers on page 30 | Right: A2 sticker on page 31


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2018-01-11T15:27:24.093
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question
travel
What are these A2 and A3 stickers?


While it's true that this manga lacks any dialogs, there are actually 2 pages
at the end (pg. 196-197) that describe the whole scenes from the beginning
until the end.

For page 30-31,

![pg. 30-31](https://i.stack.imgur.com/NOFi9m.png)

> **30-31** 鞄の中にファクシミリ用感熱紙、コピー用紙、ファイルブックなどの文具又は書類が覗いている。
>
> **30-31** Thermal papers for facsimile, copy paper, filing book and other
> stationaries or documents are peeking through the bag.

Researching those things returned these images:

[![thermal paper for
facsimile](https://i.stack.imgur.com/Zyhr9m.png)](https://i.stack.imgur.com/Zyhr9.png)
[![copy
papers](https://i.stack.imgur.com/Xe56im.png)](https://i.stack.imgur.com/Xe56i.png)

Thermal papers for facsimile by Fujifilm | Copy papers by Super Echo

Thus, I believe [spiel's
comment](https://anime.stackexchange.com/questions/7455/what-are-
these-a2-and-a3-stickers#comment8858_7455) was actually right: **they are
standard paper size labels**. The A3 thermal papers are rolled into a
cylinder, and the A2 copy papers are showing their shorter side. (Which means
that the filing book is also A2-size, [which also
exists](https://i.stack.imgur.com/Rr3tg.png))


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answer