My 2 were 6lb and 6lb 4oz and we clothed from birth. Diddy diapers, XS sandys, bamboo terries, swaddlebees, bimbles all worked well with an airflow wrap.
When Em was tiny we mainly used teenyfits ( easy dad nappies ), and xs sandies I also had 2 xs oww which were lovely but for me they were too expensive for the short time they fitted her. I also had 8 bamboo terries and a pile of normal terries which with hindsight were probable my favourite under motherease wraps