Any option to setup small icons on tab ?
. i dont see options in settings.
Instead of posting a huge screenshot, it would have been better to mention the DE and the name of the terminal (on a screenshot one does not have to be able to recognize this also necessarily):
Xfce, xfce4-terminal
The main appearance of programs is determined centrally (iconsets, fonts etc.), e.g. for KDE/Qt programs in the settings of Plasma. Here it is a Gtk(3) program on a Gtk3 based DE. I don’t use Xfce (only now in a VM) to tell you which graphical program is usually used.
After that you can still adjust the settings in some programs individually.
But you have a manpage? 
The size of the icons isn’t adjustable with options. But you can hide them:
xfce4-terminal --hide-toolbar --show-menubar
Or you can hide the menubar, too. With [F10] you can display it.
This you could set permanent in “~/.config/xfce4/terminal/terminalrc”:
MiscMenubarDefault=SHOW
MiscToolbarDefault=FALSE
Btw., please use a meaningful subject in the future!
E.g. here “Icon size in the menu of xfce4-terminal”.