Red Glare/Missile launcher Caliber?

[Vault Buster]

I know it's an awkward question. But I remember learning that Power Armor was valued for its ability to be a mobile weapons platform. My question is mainly what caliber are the Missiles and rockets? From what I've seen, the missiles from fallout 3/Nv/ (Somewhat) 4 have a diameter similar to a 90-100mm shell. My question is. Does the game ever state what the caliber is? And the Red Glare, those Rockets look like tiny 37mm shells flying. Does the game also state their caliber?

I'm just simply wondering what the caliber is and if anyone has taken the time to look into it themselves as well and confirm it was around what I stated. (Please excuse the shit grammar. On mobile as the thought popped to mind)