My 12 yr old son needed a suit for a school event. I ordered two different brands and two different sizes.This one was a size 18 which just fit him. The quality was very good in my opinion.The other style I ordered the quality was not as nice. It was a size 20 and it ran smaller than this 18.He’s the taller boy in the navy. We used our own shirt and tie. Even though this set come with those items.My son is 5’7 and weighs about 140-145. He has thicker legs and a bit of a body. This suit is a slim fit. Anyone who isn’t as stalky will do fine. This was a tighter fit for him which was great. He didn’t want it too baggy. For a couple hour event it was perfect! To wear this on the daily or often. It would be really frustrating for him. He would need to size up to the 20.It was a little long on him. We just tucked the fabric under an inch or so. With the shoes on you really couldn’t tell.I absolutely recommend this suit! The quality is great and will hold up for quite some time!