Make sidebar less wide and enlarge pics?

  1. I recently answered similar question about columns in WooCommerce

This example sets 3 columns but it would be very easy to set 2 columns by changing item width and number of columns.

  1. To remove sidebar from WooCommerce cart you can use this code in Theme Options - Other - Custom CSS
.woocommerce-cart #secondary {
    display: none;
}
.woocommerce-cart .content-area {
    width: 100%;
}
  1. To make sidebar smaller you have to replace col-md-4 with col-md-3 in sidebar.php.
    Then replace col-md-8 with col-md-9 in all template files where you can find this value mentioned and then inside file called woo-setup.php which you can find in theme folder - inc.