Helps reduce low back pain and fatigue during pregnancy. Mom-Ez Maternity Back Support is the perfect solution for expecting moms who prefer a wider support. View detailed information and size chart Mom-EZ sizes: Small = up to dress size 8-hip to 36"; Medium = dress size 8 to 14-hip 36" to 40"; Large = dress size 14 to 22-hip 40" to 46"; X Large = dress size 22 plus-hip over 46".