

Jiraiya stated that Tsunade's _oppai_ size was **106cm**.

From [Tsunade article](http://naruto.wikia.com/wiki/Tsunade):

> Despite being known as flat-chested in her childhood, she now has a rather
> large bust; **106 centimetres** in circumference, according to Jiraiya.

From [Jiraiya article](http://naruto.wikia.com/wiki/Jiraiya):

> when caught spying on Tsunade in his younger years, she proceeded to break
> both of his arms, six of his ribs, and ruptured a number of organs as
> punishment.

Considering the amount of fear and respect Jiraiya then developed towards her,
**how did he know the measurement of the adult Tsunade?**

Source: <https://www.youtube.com/watch?v=ny7Fni193Jk>

(I'm really sorry about the quality of the video)

Below is the image from the corresponding scene in the manga (chapter 406,
page 9):

![](https://i.stack.imgur.com/qVJge.png)


CC BY-SA 3.0
2015-01-31T11:59:46.210
18999
2022-12-23T06:09:39.830
2015-02-14T02:03:16.080
11083
11083
question
naruto
How did Jiraiya find out Tsunade's breast size?


Jiraiya was a very powerful ninja, and particularly proficient in stealth
missions. He was almost the sole source of all information on Akatsuki, and
was able to enter Amegakure and defeat several of Pain's bodies.

Jiraiya feared Tsunade after she beat him particularly badly once, but if the
mission was important enough he showed himself to be ready to risk death.

I believe that with careful planning and execution, Jiraiya could have and
would have done this.


CC BY-SA 3.0
2015-02-01T21:18:38.100
19031
2015-02-01T21:18:38.100
4515
18999
answer


My best guest is he use his [Cloak of Invisibility
Technique](http://naruto.wikia.com/wiki/Cloak_of_Invisibility_Technique) a.k.a
Cloaking Technique. (Synonymous to Naruto's kage bunshin). I just can't
remember on what episode of manga the 3rd Hokage mentioned about Jiraiya using
it (I think during a flashback of their training).


CC BY-SA 3.0
2015-02-02T06:54:29.460
19043
2015-02-02T06:54:29.460
1709
18999
answer


During the time he was training Naruto, Jiraiya was seen fooling around with
girls. It could be from the experience with girls that he had gathered for
decades, that he was able to measure a girl's breast size based on looking
only.


CC BY-SA 3.0
2015-02-02T07:46:34.307
19044
2015-05-31T03:38:42.963
2015-05-31T03:38:42.963
11083
7866
18999
answer


Maybe Jiraiya transformed into Tsunade using a transformation technique and
found the size using traditional measures by measuring himself(!).

He may have used [Sexy
Technique](http://naruto.wikia.com/wiki/Sexy_Technique).

![](https://i.stack.imgur.com/39UEr.png)


CC BY-SA 3.0
2015-02-05T08:32:11.230
19140
2015-02-11T00:42:56.233
2015-02-11T00:42:56.233
1908
4163
18999
answer


I believe the real reason why Jiraiya knows Tsunade's measurements probably
has to do with him being somewhat of a lady's man in his own words. Which can
be confirmed as there's an occasion when he's surrounded by women, thus
meaning that he is such an experienced lover that he is capable of guessing a
woman's measurement by looking at them. Plus he spent a lot of time spying on
Tsunade in hot springs!


CC BY-SA 4.0
2022-12-23T06:09:39.830
67573
2022-12-23T06:09:39.830
70913
18999
answer