I have managed to figure the image is the product image which I just uploaded. But I still cannot control the default size of the display. The product image size should be 300×300 as I inspected the element but it is showing 1164x 1164. Please let me know how I can adjust the image size here with the PBtheme.
Here’s how you can change the default image size in Profit Builder by going to Appearance > PB Theme Options > Advanced Tab > Featured Images:
The other option is to edit the image in WooCommerce as here (note that this is a WordPress function):https://kb.imsuccesscenter.com/kb/pbv-1-how-to-resize-images-in-woocommerce/
Additionally, if you are using custom code for WooCommerce, you will want to speak with WooCommerce support: https://wordpress.org/support/plugin/woocommerce