Now that you brought up the subject of the lady-foot bar. I find that almost all have a decent taper to length ratio save for the absolute bottom bargain basement verity.
This is where any semblance of a useful lady-foot ends though. Even long standing high end branded ones far too often get this end of the bar completely wrong by adding way too much curve angle. I've seen some which the tip can not be inserted under an object without the bar being held almost horizontal over the object in question, this usually means that if the part is more than an inch tall you are never going to get the tip under it. Some have a very pronounced tall heal and a poor curvature angle.
Some may know what we call the lady-foot bar as a Heal bar or the Military term as bar long tapered with rolled head or just roll head pry bar.
And many iron workers use the name sleever bar instead of the term weevil bar