Make thumbnail larger, improve shop layout.

assets/css/twenty-twenty.scss

@@ -1417,6 +1417,23 @@ a.reset_variations {
 			margin: 0 5vw;
 		}
 	}
+
+	/* Shop layout */
+	ul.products {
+		display: flex;
+		justify-content: space-evenly;
+		align-items: stretch;
+		flex-direction: row;
+		flex-wrap: wrap;
+
+		li.product {
+			display: flex;
+			flex-direction: column;
+			justify-content: space-between;
+			align-items: center;
+			margin-bottom: 5em;
+		}
+	}
 }
 
 @media only screen and (max-width: 768px) {

includes/theme-support/class-wc-twenty-twenty.php

@@ -38,7 +38,7 @@ class WC_Twenty_Twenty {
 		add_theme_support(
 			'woocommerce',
 			array(
-				'thumbnail_image_width' => 300,
+				'thumbnail_image_width' => 450,
 				'single_image_width'    => 600,
 			)
 		);