Featured Image - Alignment and Size

I have a featured image that is 500 x 328 and will be standard for most posts. I want my featured image to be centered and at 100% the same size as the image. It is making it far too large and over to the left instead of centered. What CSS is needed to be able to accomplish this? I have tried a few different options but none of them have worked thus far.

Hi @datasplit,

Can you show us the URL? So that we can check it and let you know a solution.

Let us know,