Small. Medium. Large. That's all you need. They come in glass, stainless steel, wood and plastic. Bells and whistles galore: microwavable, stove-top capable, pouring spouts, with or without lids and skid proof bottoms. All I wanted was some easy to clean, light-weight, durable mixing bowls. Therefore I ended up getting three stainless steel bowls a 1 1/2-quart; a 2 1/2- to 3-quart; and a 4- to 6-quart. I used them to toss salads, to serve popcorn, and of course to mix ingredients. The ease of cleaning a stainless steel bowl cannot be beat. They take up no more room than the single largest bowl, as they stack inside of each other. They are perfect.