Picture of Open a Beer Bottle with a Piece of Wood
Have you ever been unable to enjoy your favorite brew because you cant find a bottle opener? Well, worry no more. There's always a piece of wood laying around.

Step 1: The Complexity of Design

Picture of The Complexity of Design
Photo 1
 This is the average length & width

Photo 2
 This is the average thickness 

Photo 3 
 Here are a few I made for some folks. (You can take it to the next level by adding a design to your bottle opener)