Normal 4:3/5:4 resolutions:

(01) 1024x768
(02) 1280x1024
(03) 1600x1200
(04) 1920x1440
(05) 2560x1920

HD Widescreen 16:9 resolutions:

(06) 1366x768
(07) 1600x900
(08) 1920x1080
(09) 2560x1440

Widescreen 16:10 resolutions:

(10) 1280x800
(11) 1440x900
(12) 1680x1050
(13) 1920x1200
(14) 2560x1600
(15) 2880x1800 (Original)

iPhone Wallpaper:

(16) 640x960 (iPhone 4/4S)
(17) 640x1136 (iPhone 5/5S/5C/SE)
(18) 750x1334 (iPhone 8/7/6/6S)
(19) 828x1792 (iPhone 11/XR)
(20) 1080x1920 (iPhone 8/7/6/6S Plus)

(01) (02) (03) (04) (05)

(06) (07) (08) (09) (10)

(11) (12) (13) (14) (15)

(16) (17) (18) (19) (20)