Hello,

Actually, under to the 4-Column Layout there isn’t much space available between the Products so we have applied the following Custom CSS on your Site to adjust the Font Size of the Add to Cart button to accommodate that Layout:

.product-grid-item.col-lg-3.col-md-3.col-6 .add_to_cart_button.ajax_add_to_cart.add-to-cart-loop span {
    font-size: 0.9em !important;
}

It now appears fine: https://snipboard.io/XNHDuY.jpg

Please check back your Site after completely clearing the browser and server cache.

Best Regards.