They should make reasonable height growth each year so that by five years old they are 5 to 6 feet (1.5 to 1.8m) tall or higher.
Disgwylir tyfiant rhesymol yn eu huchder bob blwyddyn fel eu bod yn 5 i 6 troedfedd (1.5 i 1.8m) o daldra neu uwch erbyn eu bod yn bum oed.