Boyfriends insecurity, how can i help?

So my boyfriend and I haven't been intimate yet but he confided in me a couple of nights ago that he's really insecure because he's "small". He then told me how small, and although it is, it literally does not matter to me because I love him for so many other reasons.

He's a virgin and hasn't even experienced his first kiss yet so I know he's nervous and shy. I've tried my best to be so supportive and reassuring but what are some other things I can do to help alleviate the anxiety and improve our relationship? ❤️

If you comment check back. I'll probably respond via post edits to keep anonymous ❤️

Meant to add were in a ldr :)