Curious about the thumb down icon for this question, lol.
But anyways, normal limit of stacks of items is 125. Meaning you can have 125 different stacks of items regardless of how many per stack. But if you go to the bank and open it there should be a message somewhere saying you have X of Y items in your bank. X=current number of items in your bank and Y=the max amount you can have. So if you're an active player head to your nearest bank and solve for Y!
I think the text floats above your head when it opens or on the side.
No limit whatsoever on weight, or "stones."