The Min/Max Quantities extension for WooCommerce allows you to define minimum and maximum allowable product quantities per product, order or variation. It also lets you define a group quantity if your product must be bought in groups of x.

1. Minimum Order Qty – Customer must purchase no less than this quantity of items to checkout.
2. Maximum Order Qty – Customer must purchase no more than this quantity of items to checkout.
3. Minimum Order Value – Customer’s cart contents must cost more than this amount.
4. Maximum Order Value – Customer’s cart contents must cost less than this amount.