To configure Variation Swatches for WooCommerce Navigate to WordPress admin menu WooCommerce =>Settings =>Product Swatches=> General
1) Enable Tooltip: Enable or disable Tooltip for each product attributes.
2) Shape Style: Select rounded or square shape.
3) Attributes Image Size: You can select attributes image size from Woocommerce Pre-define image size.
4) You can set custom size also.
5) Tooltip Image size & width: You can set tooltip image size and image width.