I was wondering if I could make a budget envelope system more "convenient" and "efficient," so I created calendar envelopes. You can fill in the items and use them. ・Easier than writing in a household account book. ・Because it's calendar-style, you can see at a glance when and how much you spent. ・By using the remaining balance column, you can avoid having to open it up to check, instead of totaling at the end of the month. 【Calendar Envelope Details】 Kakugata 8-go Envelope Width: Approximately 11.9cm Height: Approximately 19.7cm Thickness: 85g / ㎡ Number of sheets: 12 sheets (Example: 2026.4 - 2027.3) 12 sheets per set. You can change the starting month, so please select from the options. ※Calculator is not included.