Size runs small, had to get 2 sizes bigger for fit beautifully made and seller very easy to deal with and return and credit within two hours.I'm a 4/6 and usually a small or occasional medium. I ordered a large due to it running smaller and hoping it would be a bit bigger so I could easily pull the tip down to nurse my baby. I'm glad I did! It fit perfectly, with no room to pull the top down so my husband had to unzip me halfway so I could take my arm out of one side. Definitely size up ateast one size, maybe even two!Quick shipment but sizing on these costumes is too small. We had to reorder 2 sizes larger than her normal size, and even then the costume fit very tightly, but she was able to get it on.I ordered this item weeks ago. I pay for Prime. Not only does it arrive 2 days late-it’s the wrong size. And I have ZERO time before my friend’s party to change it for something else. I work a lot. So I enjoy the alleged convenience of Amazon. And then this BS happens. What the hell is with the customer service & quality there lately? Was that lost in the divorce? I thought I ordered it from Amazon but it looks like it is from WISH. The dress was spit through, it was 2 sizes too small, & the sleeves were nothing like what was pictured. The whole dress was a disappointment, not as pictured, & now it’s too late to find another outfit for the themed party. Thanks for nothing. Absolute garbage. I expect more from Amazon.Got lots of compliments for this one. Bought a 3XL to fit loose when I usually wear an XL. Buy one size up to fit. Great themed costumeI'm pretty pleased with this costume but the sizes definitely run small. I'm usually a size 14, I sized up to a 16 but it fits me more like a 12.The fabric is fairly cheap but that's to be expected. Do keep in mind that this dress has pretty much no stretch whatsoever. I'm going to have to do some minor alterations on mine but luckily the dress came extremely quickly. I wasn't expecting it for another week atleast.Overall I'm not sure I'd choose this costume if I had my time back just because of the sizing issue, but I can definitely make it work.I ordered this in size 3x for a Halloween costume. The reviews said it runs small, but I usually wear a 2x right now and the size chart made it look like it might be snug. I thought I could pull it off. Nope. Way too small. I couldn't even put it all the way on, much less even attempt to zip it.When I went to return it, the size description has been updated and the size I ordered is 16-18. Definitely fits like a 16. Very good material, if it fit I would be very happy with the purchase.Runs very small. Usually a size 6 and the L was even a bit snug!