In medicine and statistics, gold standard test usually refers to a diagnostic test or benchmark that is the best available under reasonable conditions.[1] Other times, gold standard is used to refer to the most accurate test possible without restrictions.
My daughter was still in NB nappies at that age and she is almost 6 months now and still in her 0-3 months clothes and wee tiny shoes :-) She is in size 2 nappies now.Some babies are just dinky!llen is 13 weeks and is wearing size 3 nappies and 6-9 month clothes.
Old Navy sizes are 0 - 3, 3-6 and 6 - 12. If you want your baby to wear them at birth or shortly after then i'd go with 3 - 6. I bought tons of 6 - 12 for next summer. In general they run a little small until you get to about the 2T range.