Carpet Tile Specs Decoded: How Dimensions Shape Your Space

TL;DR — Carpet tile dimensions follow the modular grid of the buildings they serve. The 50x50 cm format has dominated China for nearly 30 years because metric column spacing, partitions, and furniture align to that grid. Odd sizes such as 61x61 cm and 46x91 cm are imperial conversions, 24 inches and roughly 18x36 inches, introduced with 1990s foreign investment and overseas design standards. Plank formats like 25x100 cm elongate spatial perception and enable herringbone, brick bond, and gradient layouts, while UNIJOY's larger 33x100 cm and 50x100 cm formats reduce seams for a broadloom-like look. Coverage is calculated simply: 4 tiles per m2 at 50x50 and 25x100, 3 per m2 at 33x100, and 2 per m2 at 50x100.

When specifying carpet tiles, size is a fundamental dimension that often gets overlooked. In China, the ubiquitous 50×50 cm format isn't arbitrary—it reflects decades of architectural practice. Office buildings here use metric modular systems: column spacing, partitions, and furniture all align to this grid. The 50 cm dimension fits seamlessly, maximizing material efficiency and installation speed. This convention has dominated the market for nearly 30 years.

Then there are the "odd" sizes—61×61 cm and 46×91 cm. These trace back to imperial unit conversions: 61 cm equals 24 inches, while 46×91 cm approximates 18×36 inches. Their presence in China stems from the 1990s influx of foreign investment. Multinationals and overseas design firms brought imperial-based drawings, standards, and material specs. To accommodate their design systems, these dimensions were gradually adopted locally.
More recently, plank formats like 25×100 cm have gained traction. This shift reflects evolving design priorities. Long, narrow office carpet tile planks elongate spatial perception, direct visual flow, and enable creative layouts—herringbone, brick bond, gradients—that deliver more expressive interior statements.
At UNIJOY, we're focusing on larger formats: 33×100 cm and 50×100 cm. Fewer seams mean cleaner visuals. These sizes preserve the flexibility of modular carpet tile systems while achieving the cohesive look of broadloom carpet. Paired with our lightweight soft backing, a single installer can handle transport and placement, dramatically improving on-site efficiency.
All UNIJOY formats feature area-friendly calculations:
50×50 cm: 4 tiles per m²
25×100 cm: 4 planks per m²
33×100 cm: 3 planks per m²
50×100 cm: 2 planks per m²
Designers and procurement teams get quick, accurate quantity takeoffs every time.
How to choose? It depends entirely on spatial requirements:
Square tiles (e.g., 50×50 cm): Cost-effective, easy maintenance, proven reliability
Plank formats (e.g., 25×100 cm): Design-forward, linear flow, ideal for gradients
Oversized formats (e.g., 33×100 cm, 50×100 cm): Seamless aesthetic, commanding presence for large floorplates
UNIJOY remains focused on the domestic China market. Every dimension we offer is metric-based, purpose-built for local projects. No size is inherently better—only more appropriate. Understand the logic behind the dimensions, and you'll select the carpet tile that truly fits your space.