YIVAHUBFoshan Ceramics and Sanitary Ware: Sizes, Grades and Container Maths
2026-11-03 · YIVAHUB Team
Foshan is two belts in one city, and the ceramic half punishes assumptions in a way the furniture half does not. A sofa that arrives ten centimetres narrower is an annoyance; a container of tiles ordered against a nominal size, in the wrong grade, for the wrong application, is a demolition problem. Most of what goes wrong here is decided at the specification stage.
Know which district you are buying from, because Foshan tile is a brand as much as a place. The kilns that built the reputation sit in Chancheng and Nanzhuang, with the sanitary ware kilns in the same orbit and the tile showrooms clustered where buyers can reach them. The brand is strong enough that product made elsewhere is sold as Foshan tile, which is not fatal but is worth knowing: ask for the production address as distinct from the showroom, and check it against the business licence.
The nominal size on the box is not the size of the tile, and this is where first orders lose money. A tile sold as 600 by 600 is a designation; the fired dimensions are commonly a few millimetres smaller so that a grout joint can sit between them. Whether the tile is rectified decides how wide that joint must be: rectified edges are cut square after firing and take one to two millimetres, while a fired edge needs two to three and sometimes more. Ask for the actual dimensions and the recommended joint width in writing before you lay out a project, and never mix rectified and non-rectified product on one floor, because the difference appears as lippage that no adhesive will hide.
Do the coverage arithmetic yourself, and add the waste you will actually generate. Boxes are sold by area, and coverage per box varies with format: a 600 by 600 at four pieces covers 1.44 square metres, and so does a 300 by 600 at eight, but a 600 by 1200 at two covers the same area in a far less manageable package. Order eight to ten per cent over on a standard layout and fifteen per cent on large formats, diagonal layouts or projects with many cuts, because a shortage found mid-installation means a second firing run and a shade that does not match.
Specify the grade by measurable parameters, because the labels are not portable. Every factory has its own quality vocabulary and the same word does not mean the same thing between two suppliers or two markets. Four parameters travel. Water absorption rate, which sets the classification and decides whether the tile can go outdoors or into frost; the figure that matters for exterior use is generally below half a per cent. Surface wear resistance for floor tiles, rated from light domestic traffic up to heavy commercial. Slip resistance for wet areas, an R rating in much of the world and a coefficient of friction in the United States, and the parameter that decides whether a bathroom floor is a legal installation. And shade variation, because tiles from one design in different batches can differ visibly.
Thickness and format are an installation system rather than a style choice. Large formats are specified at nine, ten or eleven millimetres, and the thicker the tile the more the substrate and adhesive have to be specified with it, because a 750 by 1500 slab on a flexible floor is a different engineering problem from a 300 by 300 on a screed. Ask what substrate and adhesive the factory recommends, and whether the product is rated for wall or floor use.
Sanitary ware has the opposite problem: it is dimensional compatibility, not a size convention. A toilet is defined by its rough-in, the distance from the finished wall to the centre of the drain, and that differs by market: twelve inches in the United States with ten also used, and commonly 300 or 400 millimetres in Chinese domestic product. The trapway type, P or S, changes whether it discharges through the floor or the wall. The bolt spread differs between the domestic and the export pattern. Flush volume is regulated, with the United States at 1.28 gallons per flush against a domestic dual flush of three and six litres. Ask two further questions about the body: the water absorption rate, because a vitrified body stains less than a lower-fired one, and the glaze quality, because crazing is what turns a cheap basin into a visible one within a season.
Container maths for ceramics run the opposite way to furniture, and this is where the real cost sits. Tiles are dense. A forty-foot high cube has a payload limit around twenty-six to twenty-eight tonnes, and a container of tiles reaches that weight limit at perhaps sixty to seventy per cent of its cubic capacity. So the price per square metre is not the number to negotiate; the freight per square metre is, and it is driven by weight and pallet efficiency. Ask for the packed weight and pallet configuration with the quotation, and compare suppliers landed rather than ex-works.
Because tiles fill a container by weight rather than volume, the mixed load is the technique that makes ceramics economical. Load the tile pallets first up to the payload limit, then fill the remaining cube with light, bulky goods from the same consolidation: furniture, lighting, foam-packed items. That is why ceramics and furniture travel together out of Foshan, and it is a load plan rather than an accident. The buyer ordering tiles alone pays for the weight; the buyer consolidating pays for the weight and uses the space as well. It is the largest saving available in this belt, and it requires both orders ready at the same time, which is a planning problem rather than a purchasing one.
Order by design and colour, and record the batch, because the minimum is set per firing run. The minimum order quantity in ceramics applies to a design in a colour, not to a number of pieces, and changing the colour means a new run rather than a continuation. That makes the batch or calibre code the most important number on the packing list, since it is what allows a reorder two years later to match the floor already installed. Write it into your records beside the model number, and ask for it on every shipment.
Where this lands with us. For ceramics and sanitary ware we confirm the production district, get the actual dimensions, grade parameters and installation recommendation in writing, and price the load landed with the packed weight rather than by the square metre. Send the product, the quantity and the destination, and the questions that decide whether the order is buildable come back with the quotation.