Midori MD Paper B6 Slim Lined Notebook Light - Pack of 3, £9.90
I've recently tried Midori/Md b6 slim and really love the size - seems to be just perfect for me: compact enough for edc (the regular TN/a5 slim size was slightly too big)
Midori MD B6 Slim Blank Notebook 88 Sheets 265gsm Medium | Cass Art
MD Paper Notebook Diary 2023 - B6 Slim • Miso Paper UK