Felix was in 0000 for a month he was 3.3 kgs (7 pound 6 ounce) , he actually fitted into 00000 width wise but he was too tall for them. I actually had some second hand 000's which were great as they were shrunk abit and he wore them as long as the 0000 other brands.

Everyone told me to buy only 000, but they were way too big most of them for him, he grew very quickly though, but he had a 0000 suit that was for "good" I would limit the amount of 0000 because in felix's case he grew into and out of 000 so quickly too..was out of alot of 000 by 2 months..but since he has been taking ages to gain weight now..has been in 00 for ages..but not all in ones sue to height..that is important to look at your own birth heights..