Our gallon bags of sea shells are a great way for crafters to get a large volume of the same style sea shell at one low price. Quantity and size varies from bag to bag however we estimate there are approx 1,000+ shells per gallon bag. Cypraea annulus. This tiny sea shell features a cream base with a gold to brown ring around the top of the sea shell. This seashell is common to Indo-Pacific, Measures 1/2"-3/4"