Callum wrote:There's nothing "official" about it; all comes down to how you qualify it. There's people that'll say Nottingham Forest are a bigger club than Arsenal and many others on accounts of their two European Cups.
Fanbase plays a big part in determining which clubs are bigger and if Chelsea win their 2nd CL they are going to make a lot of new fans and bolster their existing support.
Impressionable primary school kids are glory hunters and we're shit, most kids nowadays will pick from City, Liverpool, United and Chelsea.