[Text Panel Size in mm]

Hi! Im quite new to Affinity Publisher and just have a quick question: where can I see the width of a text panel in mm? I would like to set a text panel that is, for instance, exactly 80mm in size.

Also is there a word and character count feature? (like the information panel in Indesign?) This would help to determine whether the amount of character in a block text is ideal or too high / low.

Thanks!