Hello PR,
In order to resolve your issue, we suggest that you copy and paste the following CSS code into XStore >> Theme Options >> Theme Custom CSS >> Global CSS. After doing so, please clear your browser cache and check back to your site:
.single-product-builder .single_add_to_cart_button {
min-width: 580px !important;
}
Please note that you can adjust the min-width in the above CSS as per your requirements.
Best regards,
8Theme’s Team