Sialolithiasis is the second most common disease of the salivary glands. Sialolithiasis accounts for the most common cause of salivary gland obstruction, leading to recurrent painful swelling of the involved gland, which often becomes worse while eating. Sialoliths can occur in any of the salivary glands but appear most frequently in the submandibular gland and its duct. Very few cases of giant submandibular sialoliths have been reported in the literature. This article reports two cases of unusually large submandibular sialoliths, with clinical and radiographical signs and management. The article also reviews the various diagnostic modalities and treatment options available.