Found this on the internet and thought it would be useful to post, and to add on... please comment with the name/style of your gi (Atama Mundial #7, Kikskin Comp etc), the weave (gold, single, double etc) and the size, then the weight in pounds.
This (original) list comes from this forum. Also, elsewhere on my blog are my own gis with weights... here.
"Here are the weights of some of my Gi's (A2 for Jiu Jitsu and 175cm for Judo)
Keiko Raca-2.3kg,5.06 POUND
Faixa Rua Classico A2- 1.6 kilo/3.52 POUND
Atama gold weave-2.1kg,4.62 POUND
Fighting Films Master Judo Gi-2.6kg,5.72 POUND
Koral MKM comp- 2kg,4.40 POUND
Koral classic- 1.9kg,4.18 POUND
Mizuno Supreme Judo Gi- 2.4kg,5.28 POUND
Vulkan Pro Lite A2 - 1.62,3.8 POUND"