This granny square bag is so easy to make, you can also customize it in any colour or size you would prefare. I like to make my straps a little longer and knot them at the shoulder.
 
The completed bag measures 10" x 10" with a 50" strap.
 
To make these you will need:
 
4.5mm crochet hook
DK yarn 
Darning needle and scissors
 
Skill level - easy.
 
All patterns are written using US terminology.