The Ingalls Delaware boot looked good and leather felt okay.  Size also is acceptable for a C/D, but not a lot of room.  Calf size is good enough, and it is true size for the foot length.

The height around toe is not high enough that the tip of my big toe felt like being smashed, although my nail is trimmed short.
It is very uncomfortable.  Also, it must be the leather being not soft and elastic enough to move foot at ankle joint.  I can tell it would make permanent creases after few hours of walking.  Now that I remember, Clarks are thin and narrow.  My feet are not thin and wider side.

Even if my toe nail wouldn't feel like being vent all the time, I wouldn't be able to be sitting in the airplane wearing the boots on.  The quality of leather is major importance when choosing long boots.

I am going to try Timberland...  I found very pretty one.