Image (responsive) with “size”

I’m trying to use responsive images but wordpress is boycoting my efforts by assing “size:xxxpx” to the <figure> tag that provokes loading of a large image. For instance:

<figure id=”attachment_910″ class=”thumbnail wp-caption aligncenter” style=”width: 946px”>… image with srcset…<figcaption class=”caption wp-caption-text”>A Caption</figcaption></figure>

Is there an option somewhere in the Admin or Media panel to get rid of the “size”?
Thanks in advance!

• This topic was modified 8 years, 5 months ago by rcp.
• This topic was modified 8 years, 5 months ago by rcp.
• This topic was modified 8 years, 5 months ago by rcp.
• This topic was modified 8 years, 5 months ago by rcp.
• This topic was modified 8 years, 5 months ago by rcp.