You can always get a concealed carry shirt with a removable kydex trigger guard piece, and you should be good-to-go.
A Taser is no different in size of a gun if it's a Taser X26, and should also be carried as one.
OC is horrible stuff if you don't have the training and exposure to it. I have yet to use it on someone, and I would like to keep it that way forever. Heaven forbid I get that stuff on me because of a change of wind direction, or it doesn't work on the person because they are mentally derange or on drugs.