Same size of posts on page

Hi,

I want to view my posts in certain order – generally from left to right and from top to botton.

A the moment my site looks like this.
I want my posts to be displayed ordered alphabetically from left to right and from top to bottom.

As you can see now it doesn’t look nice.

I think that the best way to do this is to fix one size of post (same for all posts).
Then they sould be displayed like a table – rows and columns.

Can you add an option to force fixed size of posts on the page (in grid mode)