Comic Book Dimensions

I have been researching what I want my dimensions to be for when my comic hopefully goes to print, in the faraway future. The format I usually read comics in is 13 x 18 cm, which is roughly the standard comic size of manga, Japanese comics. They are my favorite to read. They have lots of background art, which I admire because I am terrible at it. Loads of active and fluid panels. If it is an action manga normally the characters are really dynamic and have very cool designs. 

The American comics normally are printed at 18 x 25 cm so they are slightly larger. I don't really read western comics very much. I am generally more interested in Japanese manga but I have read a few western classics like Maus and Persepolis. And of course cult classics like Preacher and The Walking Dead.

For my comic I think the European format would work very well. 

I found this website which is very useful in understanding dimensions for different types of print. It also offers page templates which are important to work with if you plan on going to print. They offer a wide variety of free templates.

Templates have what is considered the safe or 'live' area, which you do not want any text outside of, The margin area, and the bleed or 'trim' line.