美版四号中国戴几号戒指？
楼上的答案都是扯淡，直接引用USA official guide to fitting women's shoes 中的相关内容作答。 Fitting an American woman with European or Asian footwear is problematic at best. However， there are some general guidelines that can be used as a starting point for fitting her properly. For most American women， the appropriate size for dress shoes would fall between a EUR/UK size 37 and a EUR/UK size 41 (sized according to the European system). Based on similar proportions among shoe sizes in Europe， Asia and USA， we can conclude that a typical US woman would wear a size 5-6 in our online store. In our UK website， however， she’d be a size 5 in clothing and a size 7 in shoes. Note that these are just guides； there will always be exceptions.
In the event of being unsure about what size to order， please email us（customerservice@mafashow.com）with your question， along with details of any previous purchases you have made from us， together with your contact information so we may follow up if necessary. We will endeavour to reply to all enquiries within 24 hours.
The photo below shows how each foot is individually measured by hand using a tape measure. The key measurement taken into account when making an individual fitting decision is arch height， which affects how high or low the heel cup sits on the foot.
In addition to this， we ask all customers to please take note of the following：
• Please make sure your feet are completely dry before taking measurements.
• Please ensure you use a soft tape measure as hard measures can compress foot shape causing the feet and shoes to fit incorrectly.
• Some people have high arches while others have flat arches， so it’s important to consider this difference when ordering.
• While we do our best to provide accurate sizing， we recommend allowing extra time for delivery in case of size discrepancies. You can also return an item back to us for free within 30 days， provided the condition is satisfactory.