In June of last year, I technically owned zero blazers - despite a navy blazer generally being recommended as a great first piece of tailored menswear (and one of @Brian McGuire's favorites). I had a few suit jackets and a decent number of sportscoats (or sport coats), but technically no blazers. You can review this post from last June for more information on the technical definition of a blazer. While I personally would not walk - nor do I recommend walking - around in public correcting random people's misuse of various menswear terms, including blazer, I do recommend personally ensuring that one does use proper terms and terminology as much as possible. After all, being an honest and effective communicator entails both meaning what you say and saying what you mean - which includes proper terms and terminology. After all, as 'The Lawyer You Know' is fond of saying, "Words matter; definitions matter!" Some might argue that whether to use the term Blazer or Sportscoat is a semantic issue, but that is incorrect. Whether to use 'Sportscoat' or 'Sports Coat' or 'Sport Coat' is a semantic issue; the difference between a Blazer and a regular Sportscoat is a functional issue. It's also similar to the difference between a square and a rhombus. Just as all squares are rhombuses but not all rhombuses are squares; all blazers are sportscoats but not all sportscoats are blazers. As you can see, I now have five blazers in my closet. Two of these happen to be suit jackets but, when worn as part of a separates outfit, both adhere to the technical definition of a blazer. The first image showcases my first traditional blazer - and it's as close to my ideal blazer (from the aforementioned post) as my local menswear shop was able to get me with their basic made-to-measure program. As you can see, I didn't stop with that one... The second image shows all five, and I'll give the details here, in order...