One of the most commonly used phrases to describe something new is "brand new", but there are many synonyms that can be used to convey the same meaning. Some examples of synonyms for "brand new" include "newfangled", "fresh out of the box", "just out of the wrapping", "never been used before", "glistening", "untouched", "pristine", "mint condition", "just off the production line", "unused", "unworn", and "untarnished". Choosing the right synonym can help to add variation and interest to your writing, while still accurately conveying the intended meaning.