These are large 11-12mm side drilled potato pearls. 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.
All pearls are drilled with 2.3mm holes for jewelry making.
Price listed here is for one strand at approximately 15-15.5″ long, which has about 38 pearls.
This picture is taken with real strand and a penny to give you a better sense of their true size.