Define quantity rules for orders, products and variations. This neat little extension allows you to define minimum/maximum thresholds and multiple/group amounts per product (including variations) to restrict the quantities of items which can be purchased. The Min/Max Quantities extension lets you set up quantity rules for: Orders (Set a minimum and maximum quantity required to checkout; Set a minimum and maximum cost (of cart items) required to checkout; Exclude products from said rules) | Products (Minimum and maximum quantity required; Group/multiples required (e.g. you must purchase in groups of X); Per-variation control of the above product rules)