The missing Raspberry Pi GPIO pinout
Connecting wires to the Raspberry Pi Model A+, B+, Zero, 2, 3, 3B+, 4 GPIO?
The Pi GPIO Plus reference board provides an easy way to make sure you are hooking up the wires correctly.
Dimensions: Length = 2.55 inches Width = 0.75 inches Thickness = 0.032 inches
This is a 25 pack of the Raspberry Pi GPIO Plus reference pinout card