It's not a hard and fast rule, but most 3-piece ottoman sets will contain ottomans in a variety of different sizes. This means you're good for various uses, rather than having three of the same ottoman, which would just be.. well, a bit weird. Our 3-piece ottoman set is no exception. Made up of three ottomans, each has its own unique size and shape. The heavyweight of the trio stands tall and large, a great focal point or main decorative pouf, while the other two are a little smaller, ideal for cozy footrests or compact seating options.