Are 3D printed logos available in multiple sizes?

Yes, that is one of the most natural areas where size variation makes sense. The 3D printed logos line already suggests multiple possible uses and presentations, from decor-oriented versions to smaller object formats and other variations such as keychain-style or lamp-style outputs. That means scale is not just a technical detail there. It is often part of the identity of the product itself. A logo meant as wall decor is not the same thing as one meant as a small desk piece or a compact accessory. So yes, multiple sizes or formats are a very reasonable expectation in that product family, but the exact possibilities should still be checked on the specific listing rather than assumed abstractly.