Am i legally allowed to carry a folding knife? If so, are there size restrictions?
A good rule of thumb is the blade of the knife should not be longer than palm of your hand (going sideways).
By measurement that can be 3-5 inches, but that varies by state. Not being from Maryland, I'm sorry I cant be more specific.
But the "palm" guideline holds true in NY where I'm from.
Of course any knife used for work, like a construction blade in a toolbox is OK.

April 7th, 2009 at 1:19 am
A good rule of thumb is the blade of the knife should not be longer than palm of your hand (going sideways).
By measurement that can be 3-5 inches, but that varies by state. Not being from Maryland, I'm sorry I cant be more specific.
But the "palm" guideline holds true in NY where I'm from.
Of course any knife used for work, like a construction blade in a toolbox is OK.
References :
April 7th, 2009 at 1:57 am
When I lived in Baltimore I was able to buy a 4 inch butterfly knife from a reputable dealer with a storefront.
I believe if you google "knife laws maryland" you will find what you want.
References :