Pocket Putting Mirror Golf Alignment Training Tool CONVEX MIRROR - 3.5 " x 2.13"- shows eyes and shoulders PERFECT YOUR FORM - Effective for checking aim, alignment, swing path, and square impact PORTABLE - Instant game improvement in your pocket TRAINING EXERCISES INCLUDED - Microfiber pouch and drill brochure included "SIMPLE AND EFFECTIVE"- John Cook - 11 time PGA Tour winner