Set the order rules your store needs and Shopify enforces them in checkout. Limit quantities for chosen products, tags, collections or the whole cart, per product or together. Require a minimum order value, shown in the buyer's currency. Ask B2B buyers for a valid PO number. A storefront notice shows the limits on product pages and in the cart before checkout. Checkout messages come in 13 languages, and you can write your own for each language. Rules can be paused without deleting them.
Advanced methods for applying min & max limits to quantities...
Create custom checkout rules to control orders without any...
All in one order limits -Quantity,Term,Simultaneous,Customer-...
Limit quantity per customer with quantity selector button...