Approx. length of the item laid flat, unstretched: 3-4 Years 23" (58.5cm); 4-5 Years 24" (61cm); 5-6 Years 25" (63.5cm); 6-7 Years 26" (67cm); 7-8 Years 27" (68.5cm); 8-9 Years 28" (71cm); 9-10 Years 29" (74cm); 10-11 Years 30" (76cm); 11-12 Years 32" (81cm); 12-13 Years 33" (84cm).