boyfriend saying his dick is small?

so i’ve been dating this boy for a only a little bit but we have known eachother for over a year and have talked but we are recently official. he always talks about how his dick is small and is insecure about it but he sends me pics and videos and it really doesn’t look that small? like it’s not huge but it’s average like in the 5-6 scale. idk what to do or say to make him feel more secure about it!!!! bc im always like you’re perfect and there’s absolutely nothing wrong with it. and stuff like that. i’m also very insecure but he always says he loves me for me and not to worry and i say the same stuff but it doesn’t help what should i doooo