Kerrits breeches is where it’s at! I’m built just like you only an inch shorter. Not only are Kerrits great in heat, they fit perfectly due to their stretch. And I wear a size small, which makes me feel good about my large thighs. Plus, you can do pull ons and they are just as lovely as the button ones!
I got mine on sale for $40 and it is the best purchase I’ve ever made. They have belt loops!!
I also have VTO saddlery pull ons that I wear at shows. They are made of cotton, so a little thicker, but comfy as all get out.