Step one:
First draw a square.
Step 2:
Then draw a small triangle next to it.
Step 3:
On top of the square, draw an inverted trapezoid.
Step 4:
Draw another rectangle in the middle, but pay attention to draw a triangle below and add a little decoration.
Step 5:
Then use curved lines to draw the belt of the leather bag, making sure to draw two layers of lines.
Step 6:
You can also add a little short line as a decorative line.
Step 7:
Finally, apply a nice color and the leather bag is ready.