Where are you wearing this? Never sacrifice your only suit jacket for the sake of coming up with a new combination. Look at the Jacket to the right — the lapel widths are within classic standards, the notch lapel style is classic, the patch pocket is a bonus for use with jeans or odd trousers.
Of all the styles a man can choose, this is the one I see getting the most discussion. Most of it comes from a pretty simple question. While most men will err on the side of casual comfort, there is a growing contingent of guys who have taken things in the opposite direction. I can sympathize with this mentality. I focus a lot on this site about the difference between dressing appropriately and dressing well.
I may not be able to play a game of pickup football as well in my sportcoats as without, but having them fit me properly means I can go through a normal day just as comfortably with a jacket as I can without. Rather than carrying around some wimpy satchel or bulky daybag all day, wearing a blazer means I have the extra pocket space I need for my phone, a comb, a pen, my business card holder, and whatever else I need to carry.
Lastly, the right kind of jacket can be appropriately casual. The above stuff may seem like a lot of rules, but what they essentially do is break down a formal item into more casual version.
By default the jacket is going to be the High with your jeans being the Low so dressing up your jeans dark, slim and dressing down your jacket everything else will bridge the gap between the two and make the overall look more consistent. Most arguments you hear against it come from three different camps: Why wear that combo instead of a suit?
How are you doing it to actually make it look good? The last, and most difficult question is how to pull this look off appropriately. Here are a few other key things: Is it ok to pair a suit jacket with jeans, instead of using a blazer or sports coat for a more casual look? Suit jackets are formal and holy and should never be worn casually! It depends on the suit. Not all suits are the same and some are more formal than others, and the more formal ones are riskier than the not-so-formal ones.
First, you should look at the fabric. Is it a smooth wool or is it a rougher material, like flannel, linen or tweed? The latter would be much better suited to wear casually. The former can look out of place. Though, that depends on the two other factors. Second, look at the pattern. A checked jacket looks more casual than a solid one, or a pinstriped one. Pinstripes especially are uncommon on a blazer and are associated with formality.
Third, you should look at the color, which is easy; the lighter the jacket, the more casual it looks and the safer it is to wear with your jeans.
The first is a no-no to wear with jeans.
Seriously – you have to be in decent shape to pull off jeans and a jacket – it’s a youthful look and requires a body type whose chest is bigger than the waist. A sport coat, suit jacket, or blazer is the ultimate accessory for anyone. It broadens the shoulders, slims the waist, and enhances the pocket space for carrying more EDC gear without needing to add a day bag to your ensemble. So my answer is YES, you can wear your suit jacket with jeans, but you have to know how to match these clothes the right way. Follow the instructions above, and you should be fine. Follow the instructions above, and you should be fine.