Merlin ibuprofen is currently available in two sizes, 15ml and 100ml. 15ml is suitable for infants and children under 3 years old, 1.25ml for children 6-11 months old, equivalent to 1 dropper. 1.875ml for children 1-2 years old, equivalent to 1.5 droppers. 2.5ml for children 2-3 years old, equivalent to 2 droppers. 100ml is suitable for children 1-3 years old, equivalent to 4ml for children 10-15kg. For children aged 1-3 years who weigh 10-15kg, take 4ml. 4-6 years who weigh 16-21kg, take 5ml. 7-9 years who weigh 22-27kg, take 8ml. 10-12 years who weigh more than 30kg can take 10ml.