Special Sizes of Art Grounds

Cotton Rag Paper

Loose leaf 100% cotton French and Italian watercolor paper sheets usually come in Imperial sizes.

• 1/1 Full Imperial is ~ 30 × 22 inches or 76 × 56 cm,
  somewhat smaller than metric A1 (841 × 594 mm or 33-1/8 × 23-3/8 inches).
• 1/2 Half Imperial is ~ 22 × 15 inches or,
  a little smaller than A2 (420×594 mm or 16-1/2 x 23-3/8 in).
• 1/4 Quarter Imperial is ~ 15 × 11 inches,
  comparable to but smaller than A3 (420 × 297 mm or 16-1/2 × 11-3/4 in).
• 1/8 Imperial is ~ 11 × 7.5 inches, a bit narrower than Letter ANSI A (11×8.5 inches or 279.4×215.9 mm), and shorter and less narrower than A4 (297 × 210 mm or 11-3/4 × 8-1/4 inches).
• 1/16 Imperial is ~ 7.5 × 5.5 inches, close to metric A5 size (148 × 210 mm or 5-7/8 × 8-1/4 inches).

Other useful sizes:

A0 size (841 × 1188 mm or 33-1/8 × 46-3/4 in) is big: nearly 3 × 4 feet.

Metric System

Metric measurements are used in most countries in the world, the important exceptions being USA and Canada.

Metric paper sizes are also known as:

• SI (Système international (d'unités), The International System of Units), or
• DIN (Deutsches Institut für Normung, the German Institute for Standardization).