ESP8266 module family (versions)

At the moment of writing this note, ESP8266 had 14 versions in the family.

ESP-01

ESP-02

ESP-03

ESP-04

ESP-05

ESP-06


ESP-07

ESP-08

ESP-09
ESP-10

ESP-11

ESP-12

ESP-13

ESP-14

ESP boards summary table

Board ID	pins	pitch	form factor	LEDs	Antenna	Ant.Socket	Shielded	dimensions mm
ESP-01	8	.1"	2×4 DIL	Yes	Etched-on PCB	No	No	14.3 x 24.8
ESP-02	8	.1”	2×4 notch	No?	None	Yes	No	14.2 x 14.2
ESP-03	14	2mm	2×7 notch	No	Ceramic	No	No	17.3 x 12.1
ESP-04	14	2mm	2×4 notch	No?	None	No	No	14.7 x 12.1
ESP-05	5	.1"	1×5 SIL	No	None	Yes	No	14.2 x 14.2
ESP-06	12+GND	misc	4×3 dice	No	None	No	Yes	16.3 x 13.1
ESP-07	16	2mm	2×8 pinhole	Yes	Ceramic	Yes	Yes	20.0 x 16.0
ESP-08	14	2mm	2×7 notch	No	None	No	Yes	17.0 x 16.0
ESP-08 New	16	2mm	2×8 notch	No	None	No	Yes	18.0 x 16.0
ESP-09	12+GND	misc	4×3 dice	No	None	No	No	10.0 x 10.0
ESP-10	5	2mmm?	1×5 notch	No	None	No	No	14.2 x 10.0
ESP-11	8	1.27mm	1×8 pinhole	No?	Ceramic	No	No	17.3 x 12.1
ESP-12	16	2mm	2×8 notch	Yes	Etched-on PCB	No	Yes	24.0 x 16.0
ESP-12-E	22	2mm	2×8 notch	Yes	Etched-on PCB	No	Yes	24.0 x 16.0
ESP-13	18	1.5mm	2×9	?	Etched-on PCB	No	Yes	? x ?
ESP-14	22	2mm	2×8 + 6	1	Etched-on PCB	No	Yes	24.3 x 16.2
WROOM-02	18	1.5mm	2×9	No	Etched on PCB	No	Yes	20.0 x 18.0
WT8266-S1	18	1.5mm	3×6	1	Etched on PCB	No	Yes	15.0 x 18.6

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References: www.esp8266.com