Is it possibile to reduce it? From administratior or have i to modify php??

i think it's "item->title;" in category_item.php

Regards

Hi,

You have to use PHP:
Note that this will only leave 5 words on the title. If what you need to do is make the title smaller then you need to use CSS.

thanks so much!
with a mix of your solution and smaller font-size in css 've got the best solution :)

You are welcome. As a final note, keep in mind that the correct way to modify K2 files is creating overrides, not editing the core files. Information regarding overrides can be found at getk2.org/documentation/tutorials/174-templating-with-k2-and-the-concepts-of-sub-templates .