Well, I appreciate it's something you might do and I appreciate it, but just looking at the first page of new V4 items in the Marketplace the following characters for v4 do not list texture sizes - and that's just the ones on Page One:

http://www.renderosity.com/mod/bcs/index.php?ViewProduct=52594&TopID=11219.102553.
http://www.renderosity.com/mod/bcs/index.php?ViewProduct=52577&TopID=11219.102553.
http://www.renderosity.com/mod/bcs/index.php?ViewProduct=52563&TopID=11219.102553.
http://www.renderosity.com/mod/bcs/index.php?ViewProduct=52580&TopID=11219.102553.
http://www.renderosity.com/mod/bcs/index.php?ViewProduct=52503&TopID=11219.102553.
http://www.renderosity.com/mod/bcs/index.php?ViewProduct=52558&TopID=11219.102553.
http://www.renderosity.com/mod/bcs/index.php?ViewProduct=52528&TopID=11219.102553.
http://www.renderosity.com/mod/bcs/index.php?ViewProduct=52524&TopID=11219.102553.
http://www.renderosity.com/mod/bcs/index.php?ViewProduct=52510&TopID=11219.102553.

Just think it's a small thing to ask for and which makes shopping easier.