Unix files have (at least) two sizes

symbolic links in ext4 can be stored in the inode data, meaning zero bytes in the file representing the symbolic link itself (of course, the inode data is bigger as a result(?))

small files in btrfs can be stored in the metadata blocks instead of data blocks

I think you mean the actual size, and in that case no it's not bigger. Inodes are a fixed size, usually 256 bytes, and a file strictly has one inode. The only growth happens in data blocks.

It's also worth looking at NTFS, where a file can have multiple records, the equivalent of inodes. But it uses the same logic for tiny files. If it doesn't fit inside the base record, it goes into a data block. Multiple records only show up for large amounts of metadata.