By default, WooCommerce shows a quantity selector on a product’s page. This might not always be needed, so here are the ways in which you disable this feature.

Method 1: Using the option in the Product Data metabox

This meta box is found on the wp-admin page for editing that particular product. Scroll down past the editor and you will find the Product Data metabox and the setting under Inventory.

Method 2: Using a hook or filter

You can insert this piece of code into your theme’s functions.php file, or in a custom plugin if you wish.

Hope you find that helpful.