WooCommerce allows you to change the Product's image size for both Single Product Images and product images displayed on the Shop Page and Woo archive pages.
Go to WordPress Dashboard → Appearance → Customize → WooCommerce → Product Images:
Set the Main Image Width - this is the size of the Product Images displayed on a single product page.
Set the Thumbnail Width - this is the width of the Product Image displayed in the Shop Page, Woo Archive Pages and the Woo Products module.
Thumbnail Cropping - this is used to define a custom cropping that will apply only to the Product Images displayed in the Shop Page, Woo Archive Pages, and Woo Products module.
Note: The results of the image options will be displayed live inside the customizer while you're editing, however, if you don't see a change on the front end, make sure to regenerate your old thumbnails with the Force Regenerate Thumbnails plugin.