What is the lowest byte size?

Could you please clarify what you mean by "the lowest byte size"? Are you referring to the smallest possible byte size for data storage, or perhaps the minimum byte size for a specific type of data or transaction in the context of cryptocurrency or finance? If you're asking about the smallest byte size for data storage, the answer would depend on the technology being used. However, in the context of cryptocurrency transactions, the smallest unit of data is often measured in bytes or kilobytes, depending on the complexity of the transaction and the blockchain technology being used. It's important to note that the byte size of a transaction can vary widely depending on factors such as the number of inputs and outputs, the size of the scripts used, and the blockchain's specific design.