Sketching is a specialized type of drawing, used for preparing preliminary drawings, for capturing fleeting subjects, and as a means of perfecting technique. Sketch paper is drawing paper specially designed for sketching. Some sketch paper is multi-media, and some is specialized for a particular medium, such as marker sketchbooks. In addition, there are specialty sketchpads: for example, 3M® makes a Post-It® sketch pad with a self-stick backing for instant hanging.

Surface. The tooth of sketch paper, along with the weight, determines whether sketch paper is multi-purpose or designed to fit a specific group of media or a particular artistic medium. A smooth surface is geared towards line drawing, technical drawing, and finished art. A medium surface may be used for all dry media - including pencil, pastel, marker, Conté crayon, and charcoal - plus pen, ink, and light wash.

Weight. Paper is described in several ways: by point sizes that measure the thickness of a single sheet in thousandths of an inch, and by basis weight, a measurement in pounds of the weight of 500 sheets of the standard size of the paper, whatever that may be. Because the size of different types of paper is not consistent, comparing basis weights is complicated, but this doesn’t stop stationers from using this method to describe sketch paper. To be sure of what you’re getting, you may find it valuable to look at a different system of measurement.

The International Organization for Standardization (ISO) paper industry standard is considered the most consistent way to compare paper weights. The ISO measures weight in grams per square meter (gsm). With this measurement system, it is much easier to see what sketch paper means:

10–35 gsm	tissue paper
35–70 gsm	lighter textweight
70–100 gsm	medium textweight
100–120 gsm	heavy textweight/light cardstock
120-150 gsm	regular cardstock
150-200 gsm	heavy cardstock
>200 gsm	super heavy cardstock

Sometimes, the division between tissue paper and textweight paper is given as 40 gsm, rather than 35 gsm. Sketch paper ranges from 65 gsm to 120 gsm, that is, from weights in the lighter textweight paper range up to the borderline of regular cardstock. If you can find the gsm measurement, you may have an easier time determining which paper that will work best for you.

Types of Sketch Paper. Sketch paper is supplied in several forms, including pads, rolls, sheets, and books.

Pads and Rolls. Most sketch paper in pads is plain and white or cream-coloured, but there are those who like to sketch on graph paper, and this, too, is available. Sketch paper rolls are available in canary color, which is favored for technical drawing, as well as white, and in a lightweight paper that can double as tracing paper.

Sheets. Large, unbound sheets of paper are often geared more towards finished work than sketching applications. One finds in this group watermarked and colored paper, deckle edges, handmade paper, and other signs of quality and style that may not be best for sketching.

Sketchbooks. The style of sketch paper that a particular artist uses may have something to do with the circumstances in which the paper will be used. For example, there are specially prepared field sketchbooks that are meant to be able to go anywhere, as well as both spiral-bound and book-bound sketchbooks. Sketchbooks are often marketed as multi-purpose books for art, written notes, sketching, and more finished work. Some feature a combination of lined and blank paper, while others have a grid, and a variety of bindings suit them for different milieu.

Typical Sizes of Sketchbooks:		Typical Sizes of Sketchpads:
5 x 7 inches	127 x 128 mm	8.5 x 11 inches	216 × 279 mm
6 x 4 inches	152 x 102 mm	9 x 12 inches	229 × 305 mm
6 x 6 inches	152 x 152 mm	11 x 14 inches	279 × 356 mm
7 x 10 inches	178 x 254 mm	12 x 18 inches	305 × 457 mm
9 x 12 inches	228 × 305 mm	14 x 17 inches	366 × 432 mm
11 x 14 inches	279 × 366 mm	18 x 24 inches	457 × 610 mm

Common ISO standard paper sizes such as A1 (594 × 841 mm), A2 (420 x 594 mm), A3 (1297 x 420 mm), A4 (210 x 297 mm), and A5 (148 x 210 mm) are also available for the various types of sketch paper.