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iMessage sticker sizes
Published · 0:29
Apple specifies iMessage sticker sizes in @3x pixels: small is 300×300, regular is 408×408 and large is 618×618. Use one size for the whole pack, because Apple says not to mix sizes, and keep each file at 500 KB or less. For animation, APNG keeps 8-bit transparency, while GIF supports only single-color transparency.
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