We are a boutique and showcase a variety of brands. There isn't standardized sizing across brands, so we have included flat measurements to help you with sizing! What are Flat Measurements?... We take the garment, lay it flat on a counter and measure in inches the item from side to side. You can find these in the typed up product description usually near the bottom of the text. They may include measurements such as Across Shoulder, Across Chest, Sleeve Length, Inseam Length, etc. If you do not see a measurement that you need to help you with your sizing selection, just send us a message and we will do our best to assist. Compare these measurements to the same garment type that you like from your wardrobe. For example, take a shirt that you like the fit and compare it's flat measurements to the Saltwater Bay Flat Measurements to give you a better idea of the sizing. Fit is subjective and a preference, so it can help to know the measurement of an item that you love yourself in.