Let me start off by saying that I have nothing wrong with Rainbow Dash and as a matter of fact I own socks and a shirt that have RD on it! I just have noticed that when I go shopping for pony merchandise, from mainstream stores, it seems like she dominates the adult clothing market. From shirts, to jackets, socks and jewelry, I have found it difficult to find any other mane six character in adult sizing.
Now Etsy has a nice selection though, because they're handmade the prices are a bit high, but even then pickings are slim for other characters.
Why do you think she seemingly dominates the adult market?
Also have you found it as difficult as I have to find plus size, adult pony merch? Am I asking for the moon?
Are you finding other mane six clothing and accessories somewhere that I haven't looked? Please share if so!