Paper (disposable) plates; porcelain dinner plates; stoneware salad/keepsake dishes; and bamboo or melamine kids' plates.
Holding small jewelry like rings and earrings; organizing desk items such as paper clips; storing hair ties and other small personal items in a bathroom.
They are described as heavyweight/heavy-duty, sturdy, and leak-resistant, intended to hold full meals without bending or leaking.
Sets sized for ~16 guests appear as 62-piece and 78-piece kits. The 62-piece set lists 16 large 9" plates, 16 smaller 7" plates and 30 napkins; 78-piece sets commonly list 16 of each plate size plus 16 cups and 30 napkins.