This is a design for a "pocket star destroyer" being smaller than a full sized star destroyer but larger and more powerful than a regular cruiser.
Its about 900 meters long, armed with 12 ion cannon batteries, 16 turbolaser turrets, and 1 heavy turbolaser. Also has two hangars on the side of the ship, although their closed in this render, figured it could hold 30 or so fighters.
Tell me what you think please comment! Download for better view
edit: I changed the original file a bit, made the lighting and shadows better.