Chris...thank you for the note. Sometimes it's difficult with the FlexFit hats to find the right one (speaking from experience). We're happy to swap it out for you if you'd like and give it another go. As to why no M/L? That's something I'm curious about as well with the manufacturer. There's also no XL/XXL for the larger sizes in these Delta's but they have them in their traditional FlexFit's. Regardless, I appreciate you taking the time to drop us a line and am grateful for your support. - Victor