The Logo Requirement for Structured Mark Up says The image must be 112x112px, at minimum
The AMP Logo Guideline says The logo should fit in a 60x600px rectangle, and either be exactly 60px high (preferred), or exactly 600px wide. For example, 450x45px would not be acceptable, even though it fits within the 600x60px rectangle.
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developers.google.com...]
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developers.google.com...]
So what should be followed.