Shopify should have an option for their product pages to set in order limit incase the product is popular or to prevent customers from over buying on a release.
You can do this! On the products page, put in the inventory that you have available. Then make sure that the “Continue selling when out of stock” button is unchecked. This will block customers from overbuying.
Keep it up, it’s great to hear that you have too much demand!
Sorry to be more specific, I would like to put my full stock in. ex: 12qty, but only allow 2 per customer.
Not continue selling when out of stock.
First, do you mean 2 per order, or 2 per customer ever? A cap of 2 per order is straightforward to enforce at checkout. A true lifetime limit is harder: it needs the customer’s order history and a login, and people can still get around it by ordering as a guest with a new email, so no app can fully promise it. If per order is what you want, a limit set in your theme or on the product page only changes the number the customer sees. They can still edit the cart or use an express button that skips the cart. The one that actually stops it is a check at checkout itself.