RS4400 Size Chart

Size Chart. Newborn 7.24 Wide, 10.75 Length. 6M: 8.74 Width, 11.73 Length. 12M: 9.72 Width, 12.76 Length. 18M: 10.75 Width, 13.74 Length. 24M: 11.73 Width, 14.76 Length. Width is measured from armpit to armpit.