Hill House Louisa Nap Dress in Emerald Gingham Size: M Excellent condition No Stain, No Flaws The Louisa Nap Dress runs true to size in all fabrics. The sizing correlates to the following dress sizes: XXS=00-0, XS=0-2, S=4-6, M=8-10, L=12-14, XL=16-18, XXL=20-22. The biggest difference between the Ellie and the Louisa is the neckline; Louisa has a more fixed neckline (not as stretchy at the top seam), so if you have a larger chest we would recommend one size up from your usual Ellie size.