The most common shapes for coffee bags include:

1. Flat Bags: These have a simple rectangular shape and are often used for ground printed coffee bags . They can be easily stacked and stored.

2. Gusseted Bags: Featuring a fold on the bottom, these bags expand when filled, providing more space for the coffee. They are popular for whole beans and ground coffee.

3. Valve Bags: Similar to gusseted bags but with a one-way valve that allows gases from freshly roasted coffee to escape without letting air in. This helps maintain freshness.

4. Pouch Bags: These are flexible and can come in various shapes, often with resealable tops. They are convenient for consumers.

5. Tin Tie Bags: These have a metal tie closure,  white coffee bag  allowing for easy resealing. They are commonly used for specialty coffees.

Each shape serves different purposes in terms of storage, freshness, and presentation.