How to center an image output by a metafield in a custom liquid block

[YAJones]

Can anyone help me center (and adjust the size of) an image that has been output onto a product page using a metafield in a custom liquid block?

This is what I currently have in the custom liquid block:

{{ product.metafields.custom.display | metafield_tag }}

Thanks in advance.

[customall]

Hello @YAJones 
Can you send me your site url?

[YAJones]

Thanks for replying @customall. I could do that, but the theme I'm working on is still unpublished...

[YAJones · Accepted solution]

OK I found the solution and I'm kinda ashamed to say it, but regular HTML 'center' tags will center the image.

<center> object </center>