The marker-offset property allows you to specify the distance between the marker and the text relating to that marker.
Example
You can try to run the following code to implement marker-offset property
<html> <head> </head> <body> <ul style = "list-style: inside square; marker-offset:3em;"> <li>UK</li> <li>US</li> </ul> <ol style = "list-style: outside upper-alpha; marker-offset:3cm;"> <li>UK</li> <li>US</li> </ol> </body> </html>