diaper

hi mummy, my baby is 7.9kg , huggies platinum M size is abit tight for her but L size is abit big so i bought huggies gold L size becos cutting smaller but she wear got diaper rash even i changed every 2-3hr so i change to drypers weewee dry L size , can fit but when she urine, the diaper will turn into a lump in front which i dun feel gd ... which brand shld i try nxt?🙄 what size?