Fuxi
Fuxi 9x12 Spiral Sketchbook
Best for: Students and daily sketchers practicing with pencil and charcoal

String & Space
A large hardcover sketchbook with 40 sheets (80 pages) of 200gsm paper at 8.25 x 11.4 inches, listed for charcoal, colored pencil, oil pastel and watercolor.
Best for: Mixed media artists who want bigger, thicker pages for pen and wet media
The String & Space 200gsm Spiral Sketchbook is the large version of String & Space's 200gsm sketchbook. It holds 40 sheets, or 80 pages, of 8.25 x 11.4 inch, 200gsm paper between hard covers, with a wire binding.
String & Space lists the paper for charcoal, colored pencil, oil pastel and watercolor, and sells it as no-bleed-through, so ink does not leak to the next page. The listing says the wire binding and hardcover let you draw in landscape or portrait.
Based on the manufacturer's Amazon listing.
The listing calls it very thick paper. It is heavier than the 120gsm paper in the TX Liteart 9 x 12 sketchbook in the table below.
String & Space sells it as no-bleed-through paper, so you can use pens without ink reaching the next page.
Room for bigger drawings and full compositions.
The listing says the wire binding lets you draw in landscape or portrait.
The listing describes it as a hardcover sketchbook.
The listing names charcoal, colored pencil, oil pastel and watercolor.
Look elsewhere if: you want the same paper in a size that is easier to carry. The String & Space 200gsm Hardcover Sketchbook is 5.8 x 8.5 inches.
String & Space 200gsm Spiral Sketchbook
Choose it for: Thick paper on large pages
String & Space 200gsm Hardcover Sketchbook
Choose it for: The same paper in a carry size
TX Liteart 9 x 12 Hardcover Sketchbook
Choose it for: Many more pages at 9 x 12
Fuxi
Best for: Students and daily sketchers practicing with pencil and charcoal
Soucolor
Best for: Kids and students who draw every day or need a pad for art homework
Moleskine
Best for: Sketchers who draw in pen or pencil and want a pad that fits a pocket
MOFUNY
Best for: Mixed media artists and art students who work in several wet and dry media