Due to measurement deviation, we suggest you go 1 size upper! All authentic ECDAHICC products sold through Amazon.com are sold only by the seller ECDAHICC. We have registered the brand of ECDAHICC. ECDAHICC is specialized in all kinds of American women's fashion with competitive price,high quality, fashion style and large quantity in stock. Note: 1. Size chart is only for reference, there maybe a little difference with the item you get. 2. Color differences allowed for light effects and monitor settings.Also,please allow 1-2 cm deviation due to manual measurement. Your kindly understanding and support are highly appreciated. About Shipping 1. Usually ship in 1-3 business days 2. 8-15 Business Days by USPS,1-2 Business Days by FBA(Fulfilled by Amazon)