本文件规定了测定瓷砖尺寸特征（长度、宽度、厚度、侧面平直度、矩形度、表面平整度）和表面质量的方法。 长度、宽度、侧面平直度、矩形度和表面平整度的测量不包括面积小于4厘米的瓷砖。 注:在测量长度、宽度、侧面平直度和矩形度时，如果在固定（安装）后，这些不规则性随后隐藏在接缝中，则应忽略定位凸耳和釉面斑点以及侧面的其他不规则性。

This document specifies methods for determining the dimensional characteristics (length, width, thickness, straightness of sides, rectangularity, surface flatness) and the surface quality of ceramic tiles. Tiles with areas less than 4 cm² are excluded from measurements of length, width, straightness of sides, rectangularity and surface flatness. NOTE Spacer lugs and glaze blobs and other irregularities of the sides are intended to be ignored when measuring length, width, straightness of sides, rectangularity, if these are subsequently hidden in the joints after fixing (installation).