This is a set of 100 square bean-shaped "Pochi-bukuro" (small decorative envelopes). They are made from origami with various patterns. The size is 5cm x 5cm. (Please refer to the third image) 500-yen coins can also fit, so they're great for saving small change (^_^) I think it's cute to give them with a little chocolate or candy! They are convenient when a regular "Pochi-bukuro" is too big.