On any budget, you can improve the look of your tailoring.
Make your outfit an outstanding one

Buy conservative - If a suit isn't of the greatest quality, make sure it doesn't bring attention to itself in any other way. So buy single-breasted, notch-lapel, 2 or 3-button, plain grey or navy suits. Bright colours or patterns might seem like a good option for a cheaper product, but they will only highlight poor materials.
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Quick tip on a low quality suit http://desynme..com/2015/07/quick-tip-on-low-quality-suit.html