Rubie'szy Cow, Black/White

What size should I get for my 6 month old she’s 16 pounds

My daughter is 7 months old and she over 20 lbs. She typically wears 12-18 month clothes , would this fit her appropriately ?

Is this pink in the ears as bright pink as in the picture?

My baby is 3 months old but weighs almost 15 lbs. He wears 3-6 months and somethings 6-9 months. What size do you suggest he wears?