Darco acoustic guitar strings, by C. F. Martin, are made with value in mind.  But don't be misled by their low price.  They didn't  cuts corners on quality or tone.  Darco guitar strings are engineered and manufactured under strict tolerances and controls, using quality materials.  D-2200's are made with 92/8 phosphor bronze alloy windings, which gives them a rich and mellow tone. They may be inexpensive, but they are a surprising and incredible value in terms of tone and playability.  Darco is value without compromise.

Diameters:  .012  .016  .025  .032  .042  .054  inches 

Image:  D-2100 shown for reference only.