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I still haven't found the official size of the ISS pizza box[1] and a search on the WEB doesn't help:

"30 miles deep and 30 miles long around the space station": https://www.vice.com/en_us/article/3dkpyn/international-space-station-dodge-space-junk

"two kilometers above and below the station and 25 kilometers cross-track and down-track": https://arstechnica.com/science/2013/07/how-nasa-steers-the-international-space-station-around-space-junk/

"±25 km in the direction of motion, ±25 km perpendicular to the direction of motion, and ±0.5 km radially from the ISS as it flies in orbit": https://books.google.de/books?id=9mseNE1wkLMC&pg=PA145&lpg=PA145#v=onepage&q&f=false

"0.75 kilometers above and below the station and 25 kilometers on each side": https://www.universetoday.com/92571/iss-will-do-manuever-friday-to-avoid-collision-with-satellite-debris/

Is there any official size?

EDIT

[1]Pizza box: a safety region around the ISS. Please, see the 3rd link page 145 for an authoritative definition, which, in fact, answers my question (from that preview I didn't realize it was published by NASA).

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    $\begingroup$ Not sure what you're gonna get more authoritative than the 3rd link, which is an official NASA document. Unfortunately, NASA does not post ISS flight rules. $\endgroup$ – Organic Marble Jul 7 at 17:22
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    $\begingroup$ From that preview I didn't realize it was published by NASA. Thank you. $\endgroup$ – Cristiano Jul 7 at 17:34
  • $\begingroup$ Yeah, I had written an answer based on the same document. I didn't recognize it from the link. So I deleted the answer. The document contains a good overview of the COLA process. $\endgroup$ – Organic Marble Jul 7 at 17:55
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    $\begingroup$ I suggest adding a definition of the "pizza box" at the top of the question. I would do it by myself but my english skills are not too good. $\endgroup$ – Ginasius Jul 7 at 19:43
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    $\begingroup$ @uhoh there is a copy here: dokumen.tips/documents/… $\endgroup$ – Cristiano Jul 8 at 8:50
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I mentioned this in a comment, but an official answer is needed.

The document in your 3rd link is the official-as-it-gets NASA document The International Space Station - Operating an Outpost in the New Frontier

The ISS Flight Rules would be the authoritative source, but NASA does not publish them.

enter image description here

From p.145 in the link.

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