AndroidDevelopment:android launcher icon size

LDPI - 36px x 36px

MDPI - 48px x 48px

TVDPI - 64px x 64px

HDPI - 72px x 72px

XHDPI - 96px x 96px

XXHDPI - 144px x 144px

XXXHDPI - 192px x 192px

WEB 512px x 512px

or

LDPI = MDPI x 0.75

TVDPI = MDPI x 1.33

HDPI = MDPI x 1.5

XHDPI = MDPI x 2

XXHDPI = MDPI x 3

XXXHDPI = MDPI x 4