A conveyor module for a conveyor mat and/or conveyor chain for conveying articles, comprising a conveyor module body having: a conveying face for supporting articles to be conveyed, the conveying face being located at a top side of the module ; a supporting face arranged to be supported by a support member of a conveyor system, the supporting face being located at a bottom side of the module ; and connectors arranged such that front and rear sides of successive conveyor modules can be hingedly coupled to each other, characterized in that the module further comprises: at least two marking bodies for marking of the conveyor module, at least one first marking body at the conveying face and at least one second marking body at the supporting face , wherein the marking bodies extend substantially from inside the module at least in a direction towards an outer face of the module, wherein the marking bodies are wear indicators for visual inspection of wear of the conveyor module , wherein a first cross-section (C1) of the respective wear indicator located at the respective outer face of the conveyor module has a different visual appearance than a second cross-section (C2) of the respective wear indicator offset from the first cross-section (C1) in the direction into the module, wherein the first cross-section of the respective wear indicator has a different size than the second cross-section of the respective wear indicator , wherein the respective wear indicator has a changing cross-section size, which is changing along the direction in which the second cross-section (C2) is offset from the first cross-section (C1), at least a part of the changing being substantially gradually or so-called smoothly. a conveying face for supporting articles to be conveyed, the conveying face being located at a top side of the module ; a supporting face arranged to be supported by a support member of a conveyor system, the supporting face being located at a bottom side of the module ; and connectors arranged such that front and rear sides of successive conveyor modules can be hingedly coupled to each other, characterized in that the module further comprises: at least two marking bodies for marking of the conveyor module, at least one first marking body at the conveying face and at least one second marking body at the supporting face , wherein the marking bodies extend substantially from inside the module at least in a direction towards an outer face of the module, wherein the marking bodies are wear indicators for visual inspection of wear of the conveyor module , wherein a first cross-section (C1) of the respective wear indicator located at the respective outer face of the conveyor module has a different visual appearance than a second cross-section (C2) of the respective wear indicator offset from the first cross-section (C1) in the direction into the module, wherein the first cross-section of the respective wear indicator has a different size than the second cross-section of the respective wear indicator , wherein the respective wear indicator has a changing cross-section size, which is changing along the direction in which the second cross-section (C2) is offset from the first cross-section (C1), at least a part of the changing being substantially gradually or so-called smoothly. <EOS>