Dear [Factory Name],
I hope this message finds you well. We have been receiving numerous complaints from our partners regarding the quality of packaging for our toys, which has unfortunately resulted in some products being deemed unsellable upon arrival. Concerns have specifically been raised about the blister sizes not matching the backing cards and the presence of protruding flanges. We kindly ask that you give as much attention to the packaging quality as you do to the toy itself to prevent these issues in the future. Your collaboration on this matter is greatly appreciated.
Best regards,
[Your Name]
[Your Position]
[Your Company]