Yeah I got some petites to try on DD2 and they just didn't sit well - the ladies on another forum I visit (nappy addicts) said that it woudl be very unlikely for any bubba to actually grow out of the mediums - but they were too small for her, even on the largest setting. Actually I honestly could not find any commercially made products that fit "perfectly" - that I found in the WAHM world.

WOAB - SHP lushie/thirsties PUL cover
WOMB - Beetlebums pocket with Radar applique