Hi there. My babies comparisons won't help much because I had two tiny babies. Molly was 6lb8oz and Ruby was 6lb6oz, but the thing I wanted to mention was that with the suits, its not just the length top to toe that counts but also the torso length. Molly was still wearing 000 bodysuits when she was 8mths old - she was a long baby (97th percentile), but it was all in the legs - her torso was quite little, so she got really good wear out of her one pieces, even the bonds ones. She's 2 now, and is still wearing size 1 for some things. Ruby is 9 weeks and is still 0000 size, but I'm putting her in 000 because I don't want to see her in the same few clothes all the time. She looks funny because her clothes are swimming on her at the moment, but anyway!