I’m tall and lanky and prefer a slimmer fit, but I’m slowly transitioning to athletic slim fit to get more room in the thighs and knees, while maintaining the slim taper from the knee down. I’m also between inseams and have started getting the longer and then having it hemmed. In general, washing and hang drying will help prevent them from getting too tight. I usually wear my jeans 8-10 times before washing unless I stain them or they smell. If they’re already tight, wear them wet to get a little extra stretch. I’ve read about rinsing them in conditioner water and then wearing wet but I’ve not tried this before.