Mnemosyne notebooks have some of the smoothest paper and their dot grid notebook is great for its flexibility. Each page has a header area at the top for date and title, the pages are printed on both sides of each sheet, and they're micro-perforated for clean removal.
Measures 9 1/8" wide x 11 5/8" tall, 140 pages. Perforated white 80 gsm paper, 5mm dot spacing, slightly rounded corners. Wire-o bound, black plastic front and back covers. Info sticker on the cover (pictured) is removable. Made in Japan.