These are packs of 100 undrilled ringtop cowry shells. The shells are approximately 1/2" to 3/4" long.
You will not receive the exact shells from the photos but ones similar. There is quite a bit of variety in the shells as you can see from the photos.
They can be used for a variety of crafts and jewelry.
A USFWS export permit is required for all shipments outside the USA.