The Monster Shells This items sells for as much as $75.00 in magic shops around the country. Monster Shells, The Giant 3 Shell Game is here. The shells are HUGE. 8 inches long x 6 inches wide x 3 inches deep! Each set contains 3 Giant Shells & 4 large Red Spongeballs, Great for:Close up, Small Stand up Shows and Trade Shows, If your tired of doing what everyone else is doing, Monster Shells will set you apart.