You can easily control the length via adding "long dress" or equivalents to the prompt.
Since all these SD3 shenanigans don't seem to find a satisfying end, and people asked for some Pony Loras. Let's give it a try!
As always, keep in mind: I'll try to use the absolute most basic prompt in my samples, so you can see the baseline that's possible (and I absolutely suck at prompting).
Tell me what you think and have fun!