Colorful lightning bolts made in Adobe Illustrator. The lightning bolt comes in five colors (red, pink, yellow, blue and green) and two styles (volume and flat). Included is the original .ai and .eps files (you will need vector editing software to edit this) as well as the .png files.
.png files are 1000×500 pixels and 150 PPI. If you need a custom size, download a vector editing program (Inkscape is free), and open up the .eps. A pop-up will appear asking you for dimensions—it can be absolutely any size. After you’ve set the dimensions save it out as a file type of your choice.