Assortment

Assortment- the assortment is how many items a retailer offers of a certain category. Example: If the category is toothpaste. The assortment will be whitening toothpaste, cavity fighting toothpaste, fresh breath toothpaste and, total care toothpaste. or Mac's offers a small assortment of shampoos since they only offer two types.

I could add another example.

Source: Marketing Channel Management Custom Publication page 69