it's really important to pick up a right comb for our babies as the have sensitive scalp so I would suggest you Velura Bamboo and neem comb for babies which is perfect and comes with good quality and

Saman Hi, For a 6-month-old baby, it’s best to use a soft-bristled baby brush or a wide-toothed baby comb designed specifically for infants

I am using bamboo comb from Velura. It's ergonomic, naturally anti bacterial and is light weight. It doesn't have sharp teeth so good for gentle scalp.