depends on the size? big boy
cheshire cat?
Either expression is correct, however 'I am pleased to meet you Thomas' is more commonly used and probably sounds more natural.
When trying to find the solution to a grammar question, the trick is to figure out if the word you are using is a singular word or a plural word, The word "couple" is a singular word - you have one...
"As pleased as Punch".
happy (She is pleased with you: she is happy with you)