Measure from the top of head to feet (end of toes if a baby doll)
For dolls measuring 33 - 36 cms (13"-14") order 14". These dolls include My First Annabel and My little Baby Born.
For dolls measuring 37-41 cms (15"-16") order 16". These dolls include the original Tiny Tears and Timmy Tears.
For dolls measuring 42cms - 48cms (17"-19") order 18". These include Annabel, Baby Born, Chou Chou, Maddy, Millie, Luke etc.