Hello @DLCMS,

The Free version of the Trade Line theme only has the option to either hide or display the featured image in Large image size in the page / post. You can control the image size of the page by using some Custom CSS in your Admin Dashboard > Appearance > Customize > Theme Options > Advanced Options > Custom CSS as given below to control height and width of the image :

.page .entry-content img.aligncenter.wp-post-image {
    height: 300px;
    width: 434px;
}

Alternatively, you can also choose to upgrade to the Pro version of the theme that already contains the feature you are looking for along with many other amazing features. To know about this and other features of the Trade Line Pro theme see the link here : http://themepalace.com/downloads/trade-line-pro/

Hope this Helps,

Best regards !!

Hello,

In the pro version of the Trade Line theme please go to your Admin Dashboard > Appearance > Customize > Theme Options > Layout Options > Image in Single Post/Page Setting.

Under this setting option you can choose to select various image sizes for the single post page featured image display size. Select your desired image size and save your changes to get the image size displayed in the posts / page.

Hope this Help.

Best Regards !!

Hello,

The image sizes available in the drop-down list are the registered image sizes currently in the Trade Line Pro theme.

For the “in-between” size we would require to use the Custom CSS giving the custom height / width to the image statically.

The CSS that can be used for the custom image size is :

.page .entry-content img.aligncenter.wp-post-image {
    height: 300px;
    width: 434px;
}

Changing the value to your desired size, you can achieve the “in-between” image size for your pages.

Hope this Helps,

Best Regards !!