(Main Requests) I am considering purchasing this bi-color design in a mini 6 size, but would it be possible to add a band or other fastener? (Price) We will provide an estimate once the specifications are finalized. (The following is product information for reference) This is a narrow-size system notebook. The pocket is a slip pocket, making it easy to insert items. It has a simple yet clean design, making it a visually appealing notebook. The sample leather uses Margot Navy for the exterior and Raspberry for the interior, resulting in a sharp impression. You can choose from various colors for the front and back leather. ♪ Main Standard Specifications The ring is screw-type and removable. The head of the screw is visible from the spine. Ring guards and large pockets on the left and right are included. * The ring hardware 1000 (estimated) is subject to change based on procurement costs, and the actual cost (including fees) at that time will be added. The following are options (additional fees). The costs are estimates. They may vary depending on the content. ・Left and right mini pockets 1000 ・Refillable divider 1000 ・Refillable pen holder 1500 ・Protective sheet adoption 2200 This is an extended version of the ring guard. By inserting it into the left and right pockets, the head of the ring hardware is no longer visible from the spine. It is removable and can also be used as a notebook cover. Please note that the ring guard will not be included when this option is selected. ・Size change 1000 The overall size is designed with a 20mm ring diameter as standard, but it can also be changed to 15mm or 30mm as an option. ♪ You can choose from various Italian leathers. Please refer to the following for examples. https://jp.mercari.com/item/m60534177198?afid=0769274469&source_location=share&utm_medium=share&utm_source=ios * Please comment before ordering, as some leathers may be out of stock.