If you're looking to style a full suit with a waistcoat, I've got some tips for you. A waistcoat can add a touch of elegance and sophistication to your overall look. Here's how you can style it:

1. Colors: Choose a waistcoat color that complements the rest of your suit. For a classic look, opt for a waistcoat that matches your suit color. If you want to add some contrast, go for a waistcoat in a complementary shade.

2. Fit: Ensure that your waistcoat fits well and is properly tailored. It should be snug but not too tight, with the bottom edge hitting just above your belt line.

3. Shirt and Tie: Pair your waistcoat with a crisp dress shirt and a stylish tie. Choose a tie that complements the color of your waistcoat and suit.

4. Accessories: Complete your look with a pocket square, cufflinks, and a stylish watch. These accessories can add a touch of personality to your outfit.