• Size: 29×29
• Version: 3

Alas, I wasn’t able to scan this.

• Size: 29×29
• Version: 3
• Error correction: M
• Encoding mode: bytes
• Contents: HTTP URL without path

As this URL does not contain a path, the entire contents is case-insensitive, and could thus be rendered in alphanumeric mode. With the same error correction mode, the above QR code would fit in 25×25 modules, version 2: