Not everyone wants to buy a minimum of a pound of every kind of garlic they want to try so most growers have some special sampler assortments that contain two bulbs each of several kinds of garlic.
Every kind of garlic is unique in taste, flavor, secondary flavor and aftertaste. In order to try as many as you can to find the one you like best, sampler assortments are the answer. You can choose between an all mild sampler or an all hot/strong sampler or all hardneck garlics or all warm winter garlic for the south and west parts of the country or a gourmet samp[ler that has a little of everything in it for adventurous minded people.
The sizes of bulbs used in the samplers are usually slightly smaller than prime in order to allow for as much variety as possible but still of good planting size. This is good for customers and growers alike. Sampler assortments usually cost a little more per pound because they are labor-intensive to select, package and send. It's worth it, though because it lets you try more kinds of garlic for less money than buying in bulk. If you order samplers from different growers, you will get different samplers, based on a grower's availability.