Perhaps try Garuda website, also

Posted by canang on Monday, 9. March 2015 at 16:38 Bali Time:

In Reply to: Garuda hand luggage posted by Happyjan on Sunday, 8. March 2015 at 08:16 Bali Time:

once you find out the limit, stay within it and there will be no probs!
Garuda have a generous checked luggage allowance.