woocommerce/plugins/woocommerce-blocks/assets/js/components/product-preview/style.scss

.wc-product-preview {
	float: left;
	text-align: center;
	margin-right: 3.8%;

	.cols-1 & {
		float: none;
		margin-right: 0;
	}

	.cols-2 & {
		width: 48%;

		&:nth-of-type(2n) {
			margin-right: 0;
		}

		&:nth-of-type(2n+1) {
			clear: both;
		}
	}

	.cols-3 & {
		width: 30.75%;

		&:nth-of-type(3n) {
			margin-right: 0;
		}

		&:nth-of-type(3n+1) {
			clear: both;
		}
	}

	.cols-4 & {
		width: 22.05%;

		&:nth-of-type(4n) {
			margin-right: 0;
		}

		&:nth-of-type(4n+1) {
			clear: both;
		}
	}

	.cols-5 & {
		width: 16.9%;

		&:nth-of-type(5n) {
			margin-right: 0;
		}

		&:nth-of-type(5n+1) {
			clear: both;
		}

		.wc-product-preview__add-to-cart {
			font-size: 0.75em;
		}
	}

	.cols-6 & {
		width: 13.5%;

		&:nth-of-type(6n) {
			margin-right: 0;
		}

		&:nth-of-type(6n+1) {
			clear: both;
		}

		.wc-product-preview__add-to-cart {
			font-size: 0.75em;
		}
	}
}

.wc-product-preview__add-to-cart {
	display: inline-block;
	background: #ababab;
	border-radius: 1.5em;
	color: #fff;
	cursor: pointer;
	padding: 0.75em 1.25em;
	line-height: 1.2em;
	margin-top: 0.5em;
	margin-bottom: 1em;
}