"M" (medium), "L" (large), "XL" (extra large), "XXL" (extra extra large).
As an average, a Medium is likely to be a around a size 12. Generally a Small will be an AU 8-10 and a Large an AU 14-16. An Extra Small is likely to be a size 6, with an Extra Large likely to be a size 18.
Medium (M) Large (L) Extra Large (XL) Double Extra. Large (XXL)
So, a size M (generally a size 8/10) will be graded up by adding additional fabric evenly for a size L. If an inch is being added between a size M and L, then an inch will be subtracted from a size M to a size S.
plus-sizes XL - 4XL+
If you look for waist measurements with your sizing (as is often the case in "menswear") here's how how we categorize those sizes: XL (44 & under), 2XL (46-48), 3XL (50-52), 4XL (54-56), 5XL (58-60), 6XL (62-64).
It offers sizes XL to 5X—with a caveat. According to the sizing chart, everything is at least two sizes smaller than typical plus sizes. At Shein, 0XL is the equivalent of a size 12 instead of the usual size 16, and a 5X is a size 22, not the expected size 30 to 32.
Some stores will consider a medium to be a size 10, while others a size 12-14. As an average, a Medium is likely to be a around a size 12.
Where can find sizing recommendations? Our Fit Finder will ask for information such as your height, age and weight to help you choose the right size when you order. When you're logged in, you'll then see a size recommendation on some product pages, best matched to the information you've provided.
XL is a standard measurement and 1X+ are plus sizes.
In my experience, clothes from Shein run small. While this isn't true across the board, 90% of the time I have found this to be the case. This is why checking the sizing is important. When you hover over a certain size on the page of the item you're interested in, measurements come up.
We measure our shirts the traditional way, using collar sizes, so you will see our shirts quoted in inches - 15" (small), 15.5" (medium), 16.5" (large) and 17.5" (extra large).