Lists with only images as items?

I’m trying to create an ionic-list with only images in them (company logos). I notice that the items in the list get an <a> tag which has a padding (16px 49px 16px 16px;) from the class “item-content”, but all I really need inside the list are the company logos. What is the best way to remove this padding?

Also, in terms of image sizes, what is the best way to make sure all the company logos (list items) are the same size? The constraint is that they have different aspect ratios, and yet inside a list they should have the same height. Does this need to be sent through an image resizing service?