Yep I agree with the others. The Wondersuits are a small and snug fit. WM started out in 000s and he was just over 4 kg at birth. He only wore those for three to four weeks. He had four weeks in 00 wondersuits and is now in 0s (but wearing 00 in all other clothes). The little tackers grow so fast!

If you need to get any Wondersuits, check out KMart at the moment as they are about $5.00 something each during the sale.