image HTML modules half shown on phones

Hi everyone, I am having problems with some images on my websites shown through html modules, as they are shown prefectly fine either on pc and tablet but on phones keep the same size and it would only show half image.
I was wondering whether there is any chance to customize the module specifically for phones to show the same image smaller or anything like that? or How would solve the problem?

Thanks
Ricardo

Could you please provide me with a URL to your website, either here or via PM (click the “Private Message” text underneath my avatar) so that I may analyze it? It is a lot easier for us to diagnose issues when we have a live site to examine.