Also considering we have won 3 first division titles an Fa cup and come runners up in the champions league once I wouldn’t call us a small club but that’s just my opinion your entitled to your own
1st division titles in 1968–69, 1973–74, 1991–92
FA Cup in 1972
European Cup Winners Cup 'runners up' - 1973
Last in the Premier League - 2003/4
You might have a decent history from over mostly 40 years ago now but you have not been a top flight club for 14 years and haven't won anything significant in 26 years. You are not a big club anymore, imo, sorry. There are many clubs in the football league with similar histories, similar long time past glories but who have not been competitive in the top flight for many years. Personally I'd not go as far to describe any such clubs as small but none are big clubs anymore either. I'd have to say average clubs with significant proud histories.