Hello,
1. Theme Options > Blog & Portfolio > Blog Layout > Sidebar position > Widthout or go to Edit page > [8theme] Layout options > Sidebar Position > Without Read more – https://xstore.helpscoutdocs.com/article/45-8theme-page-post-layout-settings-8theme-post-options 2. Please go to Appearance > Widgets > add “Product Categories” widget in Shop sidebar > http://prntscr.com/jaow6j Read more – https://xstore.helpscoutdocs.com/article/48-widgets-custom-widget-areas 3. Image size depends on your need. We would recommend to use a graphics editor and prepare product images (make them the same size) before uploading it to your media gallery. Image size you can change via Customizer > Woocommerce > product images (do not forget to regenerate thumbnails) https://xstore.helpscoutdocs.com/article/89-product-images
Regards
