Draw a curved horizontal oval for the cap’s crown
Add a slightly pointed front panel shape below the oval
Sketch two side panels connected to the front
Draw a curved brim extending from the front panel
Add a seam line across the crown
Draw panel lines from the top center down to the sides
Add a button at the top center
Sketch stitching lines along the brim
Refine the outline of the cap
Erase unnecessary guide lines
Add shading to the brim and side panels
Darken the final lines of the cap