Gimped strings are gauged by the equivalent diameter system. This means that a given string is equal in weight to a certain gut diameter but the actual diameter of the string is smaller due to the added weight of the wire. A gimped string may be gauged at =1.50mm but the actual diameter of the string is 1.10 mm. The thinness and wire gives a bright tone.
Use our String Calculators to find the correct strings for your instrument. You can find Specific String Tensions here. Interested in varnished strings? Many strings come with the Option to Add Varnish.