Many screen resolutions
are proportional
in a 4:3 ratio,
so an image scaled
to fit in a different-sized
screen will still
be the correct shape,
although that scaling
may impact quality.
Common wallpaper
resolutions are
connected to common
desktop resolutions:
800x600, 1024x768,
1280x1024 and 1600x1200.
Users with widescreen
(16:9 or 16:10)
monitors have
different aspect
ratio requirements
for wallpaper,
although images
designed for standard
(4:3) monitors
can often be scaled
or cropped to
the correct shape
without undue
loss of quality.
Wallpapers are
sometimes available
in double-width
versions (e.g.
2560?1024) for
displaying on
multi-monitor
computers, where
the image appears
to fill two monitors.