Products are all listed in millimetres, I need to know the gauge size
Many people work with wire "Gauges" and there are two types of "Gauges" :
SWG = "Standard Wire Gauge"
AWG = "American Wire Gauge"
Our list of items are mainly listed with diameters in millimetres.
We have conversion tables here : https://www.wires.co.uk/acatalog/conversion.html