+I want to carry it in a suitcase and trying to find out if it fits.+
Hello c_kyr!
There would have been no confusion if the above sentence had not appeared as part of your question, or if you had specified what "it" meant, or had included that the box was to remain unopened as a gift.
You do owe Kappy, the first one who tried to translate your question and respond, an apology for your rudeness.
Based on the wording of your post, who would have assumed you wanted to carry the whole thing, including the shipping box, in a suitcase, since the factory box is sufficient for shipping as is? In the previous three years, a good number of members have asked how to carry their iMacs in luggage and not once did anyone mean to carry the box along. The usual recommendation, I'm sure you already know, was the iLugger.
Four days later and still no exact measurements, although it's very likely no larger than the measurements provided by member Ric Hepburn, if that's any help.