Hi! What brand of newborn prefolds do you recommend to go under a newborn cover? I bought some used (unsure of brand) and they don’t fit our baby. They are 10.5 x 9 prepped and the 9 is way too small to fit around her waist. The small sizes I got are way too big and long. She is 3 weeks and about 8lbs so average sized so we were surprised they were so small on her. Thanks!