My character wears cowboy boots for most of the show. The ones our costumer found had pretty high heels for someone who lives in flats and very low (1/2") heels. Last night I wore the boots for rehearsal for the first time, and I plan to wear them for every rehearsal from now on so I can be sure to get used to them. for those of you who are thinking "So the heels are higher; what's the big deal?" - a higher heel shifts your weight forward, shifts your balance, and changes your posture as your feet, legs, hips & back adjust to a different angle.
When we ran the fight scene, I found the heels made a difference in my balance when I had to turn, bend, or walk into someone and push. Not to mention that they made me a good 2"-3" taller than I am in the sneakers I've been wearing to rehearsal, so that I felt like I towered over the other women in the cast.
The boots are perhaps half a size too big, so I'll also have to experiment to see just how thick a sock I need to wear. The pair I wore last night, the thickest I own, were thick enough that my toes felt a bit squished.