how can i do for add....

[Sworm]

Hi all,
how can i do for add a standard dimension to the object part ov the index page?
Example:
If in my forum , the last post title is : "Test" (4 letters) , the part on the index, has a dimension, if in other sections, or in the same, i add another title for another last 3D (more long), the dimension on the index is different.....
How can i do for insert the same standard dimension for all last post title dark parts?

Here my problem: