Map scale and resolution - pixel size

To convert a vector map with a specific scale to pixel size the rule is:

divide the denominator of the map scale by 1,000 to get the detectable size in meters. The resolution is one half of this amount

See table below:

See ESRI for more info

https://www.esri.com/arcgis-blog/products/product/imagery/on-map-scale-and-raster-resolution/