Dear [Factory Name],
We have recently received several complaints from our partners regarding the quality of packaging for our toy products, leading to some items being deemed unsellable upon arrival at stores. The primary concerns involve discrepancies in blister sizes compared to backing cards and issues with sticking out flanges. We kindly request that you pay the same level of attention to packaging quality as you do to the toys themselves, as it significantly impacts our reputation and sales. Your cooperation in improving this matter would be greatly appreciated.
Best regards,
[Your Name]