Apple Watch Series 3 (38mm) vs Apple Watch Series 3 (42mm) Specs Comparison

Design

Dimensions
1.52 x 1.31 x 0.45 inches 38.6 x 33.3 x 11.4 mm	1.67 x 1.43 x 0.45 inches 42.5 x 36.4 x 11.4 mm
Weight
1.50 oz (42.4 g)	1.86 oz (52.8 g)
Materials
Back: Ceramic Frame: Stainless steel	Back: Ceramic Frame: Stainless steel
Resistance
Water, Dust	Water, Dust
Colors
Space Black, Silver	Space Black, Silver

Display

Size
1.5-inch	1.6-inch
Resolution
340x272px, 290 PPI	390x312px, 303 PPI
Technology
OLED	OLED
Screen-to-body
55.12 %	55.61 %
Peak brightness
1000 cd/m2 (nit)	1000 cd/m2 (nit)
Features
Pressure-sensitive, Scratch-resistant glass (Sapphire)	Pressure-sensitive, Scratch-resistant glass (Sapphire)

Hardware

System chip
Apple S3	Apple S3
Processor
Dual-core	Dual-core
GPU
PowerVR	PowerVR
RAM
768GB	768GB
Internal storage
16GB	16GB
OS
watchOS (8.x, 7.x, 6.1, 6.x, 5.1, 5, 4.x)	watchOS (8.x, 7.x, 6.1, 6.x, 5.1, 5, 4.x)

Battery

Capacity
279 mAh	341 mAh
Charging
Qi wireless charging	Qi wireless charging

Camera

Connectivity & Features

Bluetooth
4.2	4.2
WLAN
802.11 b,g,n	802.11 b,g,n
Location
A-GPS, Glonass	A-GPS, Glonass
Sensors
Accelerometer, Gyroscope, Altimeter, Compass, Heart rate, Barometer	Accelerometer, Gyroscope, Altimeter, Compass, Heart rate, Barometer
Other
NFC	NFC

Multimedia

Headphones
No 3.5mm jack	No 3.5mm jack
Speakers
Loudspeaker	Loudspeaker

Cellular

4G (FDD)
Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 18(800 Lower), 19(800 Upper), 20(800 DD), 26(850+)	Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 18(800 Lower), 19(800 Upper), 20(800 DD), 26(850+)
3G
Bands 1(2100), 5(850), 8(900)	Bands 1(2100), 5(850), 8(900)
Data Speed
LTE, HSDPA+ (4G) 42.2 Mbit/s	LTE, HSDPA+ (4G) 42.2 Mbit/s
SIM type
eSIM	eSIM

Links

Full specifications
Apple Watch Series 3 (38mm) Specs	Apple Watch Series 3 (42mm) Specs
PhoneArena Review
Apple Watch Series 3 (38mm) Review	Apple Watch Series 3 (42mm) Review