The sizes of coats
When determining the size of a coat by the size charts, standard 2-3 (cm) size mismatch should be considered. So, even if very accurate measurements are taken and brand size charts are used, little mismatches might be found still.
Common size charts are made for people of standard complexion, up to 176 (cm) height for women and up to 189 (cm) height for men. For nonstandard body complexion, determining the size by the typical size charts would be incorrect.