The Advanced Product Quantity Nulled extension makes it easy to set minimum and maximum product and cart quantities. Set fixed quantities for individual products, or display interval-based quantities in a dropdown.
Set quantity limitations by user role, and customize the error messages that display if a customer tries to purchase too much.
You can change the minimum value of the quantity field, you can set a maximum value, you can change the interval between each step in the quantity field, you can set a standard value for the quantity fields, you can add a price and qiantity suffix, you can change input type and much more.
You can force a minimum quantity a customer has to buy (ideal for wholesale shops – bulk products). For example, set the minimum value to 10 means your customers has to buy at least 10 pieces of the product.
Demo: https://codecanyon.net/item/woocommerce-advanced-quantity/11861326