Spider-Man is 29. At the moment I'm completely ignoring the soft retcon of his age back down to mid-twenties, because it doesn't make any sense in the wider context of the MU ... although I am more than a little tempted to take it into account if I ever canon update him, just to sow mass confusion among his in game acquaintances. ("So how does it feel to hit the big 3-0?" "How would I know? I'm 26.")