I started with the earth ponies because I didn't want to change too much about them structurally, just some markings and colors, plus giving them new hairstyles. (Both have short hair bc I love short haired women)
Starting off with AJ: I think she and her siblings should've had larger body types with markings, like Clydesdale horses (and Troubleshoes). So, I've given her the biggest size out of the six, not only tall, but broad.
Pinkie is the second shortest to Dashie, and paints her hooves to match the new streaks in her hair. She has fairly light patches of white along with freckles on her face. She is small, but also is more broad than the rest due to her lineage of rock farmers.