These are large 11-12mm side drilled potato pearls with larger holes. These pearls have a surface with a few irregularities and people love them for their natural look. Please click on the picture to see enlarged strands.
Price listed here is for one strand at approximately 15-15.5″ long, which has about 38 pearls. See drop down menu for options.
This picture is taken with real strand and a penny to give you a better sense of their true size.