[BirdOPrey5]

It is not possible to resize smilies via a plugin, there are no hooks available in the code that can do that.

The code that creates those <img> tags are in the class_bbcode.php file in the /includes/ directory. There looks to be 4 instances, 2 for cached smilies and 2 for smilies that are retrieved from the database.

The problem is even manually editing this code will cause more problems because you also have to edit code that controls the php, code, and html bbcodes because apparently they have to be able to "clean" smilies by finding and removing smiley code.

I see two options-

The smartest way would be to use a batch image resizer to resize all your smileys to the size you want.

There is another option that MAY work but MAY cause unforeseen issues.

In Admin CP -> Styles & Templates -> Replacement Variable Manager

You can define a relacement variable that replaces:

class="inlineimage"

with

class="inlineimage" height="35"

In my limited testing I see class="inlineimage" only seems to be present in smilies so I think it should work.

You will have to set the replacement for every style you have.

BTW- it is hieght="35" not height="35px"