Mnemosyne Basic Style is a range of wire-bound notebooks with lined paper. Many have extra markings, for checkboxes, dividing your pages into sections, titles, dates, etc.
This notebook is tiny (close to A7, but narrower), with rounded corners to make it better for pocket carry. Wire binding means it lies flat and takes up very little space on a desk; while also making it easy to hold in your hand for notes on the go.
Each sheet is perforated at the top for neat and easy removal. Lined pages use dotted lines, with one solid line half way down. Use it to divide your thoughts into sections, or just ignore it when you don't need it. Pages are lined on both sides.
50 smooth sheets, with 5mm ruling. Plastic covers to protect your notes.