This is a set of 5 bamboo lunch boxes. The sizes listed at the time of purchase were, I believe, a "bunko" (small book-sized) and a "meishi-ire" (business card case). Although it's called a business card case, it can hold about 3 rice balls. Photos 5, 6, and 7 show the larger sizes. I have used and stored them with great care, but I would like to sell them to someone who understands that they are used. They have aged beautifully over the years, developing a lovely color.