pass the beans through a tunnel with different sizes of sives
One good way to sort beans of different sizes might be weight, but this requires each bean to fall within separate ranges of weight, which for beans doesn't usually happens. Average size could work as well, with holes to filter them through, but this only works if the four types of beans are significantly different in size. Both of these work, but are imperfect.
It depends on how big the jelly beans are. In my country they come in three different sizes.
separate them by making two diffrent piles
A piece of screen can be used to separate solids with different particle sizes
Different molecular sizes apex
You can separate the juice and pulp of tomatoes from the seeds and skin when making homemade tomato juice.
A screen
The jelly bean comes in different sizes. This will result in varying volumes, so it will be difficult to cite one.
Different molecular sizes apex
Classifier Sieves are available in many different "Mesh" Sizes. These sizes are based on the holes per square inch. A size 8 would have 8 holes per square inch, and a size 20 would have 20 holes per square inch. These are used to separate different sizes of dirt from each other. Different types of prospecting equipment processes different mesh sizes of dirt.
why are raindrops different sizes?
Cells are different shapes and sizes because they have different functions. The functions dictate the shapes and sizes.