well my largest girl is over 4500grams!!
I dont know her exact age, but i think she was born in about 2002.
In 2010 she gave me a litter of 32 i think it was, no stillborns, no slugs.
Her sister is not far off this size either.
Next heaviest would be about 2700grams, and these are all ones that i have raised myself.
Will put some photos up when i get a chance.

cheers
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Dave

Ive given up counting how many rainbows i have, but its enough to deplete my credit card every rodent order....
Im an aussie in an arctic environment
Helsinki, Finland