Fits true to size, order your pre-pregnancy size; if between sizes, order one size up; Model measurements: 5'7" height, carrying twins, wearing a size small; Designed to fit throughout pregnancy and postpartum; Please use the following size conversions when ordering this item: XS=0-2; S=2-4; M=6-8; L=10-12; XL=14; Crewneck; Pullover style; Long sleeves; Imported