Images can't be enlarged in posts

In my site, the pictures i post doesn’t get bigger than a default size. it can’t be solved no matter what i do, the picture size remains the same. Visit my site, you could see all images to a default size(In all posts). Can you please help me with this one?

Hi,

Thank you for getting back. I am happy to help with your queries.

Can you share specific links to your posts needing help with to help avoid misunderstanding?

Regards,
Kharis
aThemes Support