Both 13mm and 1/2" chain can vary in dimensions as the recognised standards determine a maximum and minimum chain link size, not an exact size, so for example the dimensions of the hole into which the markers fit can vary up to 4mm in width.

Our markers have small tolerance to fit correctly so if a you are interested in having a set of chain markers for 13mm or 1/2" chain we need a few measurements to ensure you get the correct size.

Please go to our form to submit your chain dimensions so we can guide you towards the correct size chain markers. If markers need to be made to order there will be a 5-10 day lead time.