A blazer is assumed to be slim fitting, but if it's not overly loose and there are
creases around the buttons where the substance is straining, then go for a size upward and you should dodge the bullet.
Some other «issues»: the half leather seats
crease far too easily, the B pillars are too thick and difficult to see
around, the rear bumper on the driver's side is slightly out of line with the bodywork (something I seen on other 508s), dash
buttons hard to remember, daft heater system, boot design when opened allows rain to drip into the boot too easily, plastics could be better and less «scratchy».