Do you guys realise that Harry's Quiditch costume's number was 7?
Perhaps a joke at how he was the 7th Horcrux?
Or simply a coincidence?
Seven appears alot through the HP series- there's good list here:
No it's because all the seekers in quidditch have the number 7
Yeah, seven really is a lucky number!
Yeah, seven is supposed to be a really powerful number and harry was the chosen one....
What do you think?