Hello,
Our element uses the same image size 300px https://minhnha.vn/wp-content/uploads/2019/11/VERSACE_VE4353A528387_01-300×169.jpg with the same quality as the grid on the shop page http://prntscr.com/q1wmom Size of this image depends on the WooCommerce option (Appearance > Customizer > WooCommerce > Product images) and quality depends on the WordPress generation of the thumbnails.
Regards
