6907.30.30.00 - The largest surface area of which is less than 38.7 cm2

This HTS subheading, 6907.30.30.00, specifically covers glazed ceramic mosaic cubes and similar articles, not on a backing, where the largest surface area of each individual piece is capable of being enclosed within a square with a side length measuring less than 7 cm. This implies a very small size for the individual mosaic units. Examples include decorative ceramic tesserae used for intricate mosaic work in bathrooms, kitchens, or artistic applications, provided they meet the size and glazing criteria.

This category is distinguished from its sibling, 6907.30.40.00, which covers "Other" mosaic cubes and the like. While this current subheading focuses on pieces with a maximum dimension of less than 7 cm, the sibling category would encompass mosaic pieces that are 7 cm or larger in their largest dimension, or other mosaic forms not specifically detailed here. The critical differentiator lies in the maximum measurable dimension of the individual mosaic component.

As this is a leaf node within the HTS classification system, there are no further subcategories to introduce. Classification decisions for this code hinge on the precise measurement of the largest surface area of the individual ceramic mosaic pieces and confirmation that they are glazed. It is crucial for importers and exporters to accurately measure these dimensions to ensure correct classification and avoid potential customs discrepancies.