There is no "right" size to display an image in an article. In any case, no need to send an image of 3000 pixels wide width , no any screen can can’t display it in its entirety ! Unless the document is to be printed intended for printing .
-* If the picture has to be inserted into the text of an article,It It all depends on its content : if it’s a portrait, a height of 200px should be sufficient, and if it is a beautiful landscape, you can go up to @largeur_max@ pixels width ;
-* If the picture is supposed to be placed in the portfolio of an article , avoid to exceed 1000 pixels wide and 600 pixels high  ; . _ Please, note that the maximum weight not to exceed is 150M otherwise the download will be denied.

Please, note that the maximum weight should not exceed @poids_max@Mo otherwise the upload will be denied.