6907.21.90.11 - Tiles, the largest surface area of which is capable of being enclosed in a square the side of which is 30 cm or less

This HTS classification covers glazed ceramic tiles, intended for use as flags, paving, hearths, or walls, where the largest surface area can fit within a square with sides of 30 cm or less. These tiles are characterized by a glazed finish and a low water absorption rate, specifically a coefficient not exceeding 0.5% by weight. This indicates a dense ceramic body that is less permeable to moisture.

Within the broader category of "Flags and paving, hearth or wall tiles, other than those of subheading 6907.30 and 6907.40: Of a water absorption coefficient by weight not exceeding 0.5%," this specific subheading (6907.21.90.11) differentiates based on the glazing and the absence of specific mosaic or finishing characteristics. It contrasts with potential sibling categories that may have different finishing treatments or are not glazed.

As a leaf node in the HTS, this classification does not have further subdivisions. Therefore, the focus is on precisely identifying glazed ceramic tiles meeting the size criteria and low water absorption rate, distinguishing them from similar but unglazed or differently finished ceramic tiling products. Examples would include common glazed ceramic wall tiles for bathrooms and kitchens, or glazed floor tiles, provided they meet the specified dimensional and water absorption requirements.