This isn't vanity sizing people. Count on ordering a size or two up from what you typically do. Don't think about it. You didn't actually gain weight. It's just the way it is.
There are measurements for each garment and the measurements for the difference sizes available. Don't assume you know your measurements. Actually get out the tape measure it against your body. Will there be enough room in the waist, chest, and shoulders? What will the length be on you?
Sometimes a tape measure doesn't give you the best idea of fit. If you really want to be sure, measure a piece of clothing you own that is similar to the piece you are ordering. For example, I like my dresses to be a certain length. I know which dress in my closet is the shortest, but I can still wear comfortably. I measure that dress and compare it to the measurements on SheIn to decide if I should get the item.
4. Look for popular items.
SheIn allows buyers to upload pictures of themselves in the piece of clothing. You can find them below the details of the piece, but above the comments. They are incredibly helpful for determining fit of an item. The more you see of the item on other people, the better idea of fit and sizing you have. I have found the more photos generally means it's a good purchase because so many people have purchased it and liked it enough to upload a photo of themselves in it!
5. Read the comments.
Some of the comments on items are useless (e.g. "I love this item and want to buy"). However, some are very helpful. Users can input their height, weight, chest size, etc. I read the comments and see what size others purchased and if it worked out or not. I try to find several people similar in size to me to get a consensus so I know if the item runs large, small, or true to size.
I hope all these tips from my experiences will help you to have a successful shopping experience! I know for a long time I was nervous to buy because returns are always a hassle and I was so unsure about the whole sizing issue. Do you have any other tips? Let me know in the comments below!