Our products are available in 30g, 50g, and 80g sizes, including both bitter and sweet varieties. When providing free samples, we usually send the standard 30g size. If customers have special requests (such as needing a larger size or a specific flavor), we kindly ask for these to be communicated in advance. As you did not specify your preference when requesting the free sample, we sent the standard 30g size. We understand your dissatisfaction, but as the sample was provided free of charge, the shipping cost refund policy typically requires the customer to cover the shipping expenses. We hope for your understanding!