40x40

40x40 is a notation that indicates a two-dimensional measure in which the length and width are both 40 units. The term is used across fields where dimensions are specified, including design, manufacturing, architecture, textiles, and digital graphics. The actual unit is context-dependent, so 40x40 can refer to 40 centimeters by 40 centimeters, 40 inches by 40 inches, 40 millimeters by 40 millimeters, or 40 by 40 pixels, among others.

In geometry, a square with sides of 40 units has an area of 1,600 square units and a perimeter of 160 units. In tiling or grid contexts, a 40x40 layout contains 1,600 cells if each cell is 1 unit in size. In practical applications, 40x40 dimensions appear on tiles, fabric squares, rugs, or components, where the exact material and scale are determined by the chosen unit.

Common contexts include: floor or wall tiles sold as 40x40 cm or 40x40 cm depending on market; textile squares for patchwork or embroidery; small icons or thumbnails sized at 40x40 pixels in digital interfaces; and grid-based patterns or charts that use a 40-by-40 matrix.

Because 40x40 is a dimension rather than a fixed standard, its precise meaning depends on the unit and context. Specifications typically include the unit (for example, “40 cm by 40 cm”) and any tolerances or manufacturing allowances.