Size S No flaws You make it look easy. Shop the Alden Dress from Reformation, a fitted mini length dress with a mock neck and side ruching. Fit & details Designed to be fitted throughout. Customers say this style runs true to size. Non-adjustable straps, mock neck, side ruching. The model is wearing a size XS and is 5'10", 25" waist, 34.5" hips, 31" bust.