SunFounder ESP32 Starter Kit
Red, yellow, blue, green, and white are the most common LED colors, and the light emitted is usually the same color
as the appearance.
We rarely use LEDs that are transparent or matte in appearance, but the light emitted may be a color other than white.
LEDs come in four sizes: 3mm, 5mm, 8mm and 10mm, with 5mm being the most common size.
Below is the LED size of 5mm in mm.
5.10. LED 709