ISO 13383-1:2012描述了使用抛光和蚀刻试样的显微照片测定精细陶瓷（高级陶瓷、高级工业陶瓷）粒度的手动测量方法。ISO 13383-1:2012中描述的方法不能得出真实的平均晶粒直径，但根据分析二维截面所用的方法，可以得出一个较小的参数。与真实晶粒尺寸的关系取决于晶粒形状和微观结构各向异性的程度。 ISO 13383-1:2012包含两种主要方法，A和B。 方法A是平均线性截距技术。方法A1适用于单相陶瓷，以及主要晶相和玻璃质晶界相体积小于约5%（截距计数足够）的陶瓷。方法A2适用于孔隙或第二相体积超过5%的陶瓷，或测量单个截距长度的主晶相超过一个的陶瓷，可以选择使用该方法来创建尺寸分布。 后一种方法允许区分孔隙或相，并分别计算每个孔隙或相的平均线性截距大小。 方法B是平均等效圆直径法，适用于任何类型的有或没有第二相的陶瓷。该方法也可用于确定晶粒长宽比和尺寸分布。

ISO 13383-1:2012 describes manual methods of making measurements for the determination of grain size of fine ceramics (advanced ceramics, advanced technical ceramics) using photomicrographs of polished and etched test pieces. The methods described in ISO 13383-1:2012 do not yield the true mean grain diameter, but a somewhat smaller parameter depending on the method applied to analyse a two-dimensional section. The relationship to true grain dimensions depends on the grain shape and the degree of microstructural anisotropy. ISO 13383-1:2012 contains two principal methods, A and B. Method A is the mean linear intercept technique. Method A1 applies to single-phase ceramics, and to ceramics with a principal crystalline phase and a glassy grain-boundary phase of less than about 5 % by volume for which intercept counting suffices. Method A2 applies to ceramics with more than about 5 % by volume of pores or secondary phases, or ceramics with more than one major crystalline phase where individual intercept lengths are measured, which can optionally be used to create a size distribution. This latter method allows the pores or phases to be distinguished and the mean linear intercept size for each to be calculated separately. Method B is the mean equivalent circle diameter method, which applies to any type of ceramic with or without a secondary phase. This method may also be employed for determining grain aspect ratio and a size distribution.