This shirt is nice, not amazing, but passable. The fabric, as advertized, is a cotton-poly blend, and indeed, the polyester is evident but should make it last and wear well. It seems well-made. Regarding the sizing: I was happy to see that the XS is true to size (for reference, I am 32-25-34). In this case only the sleeves were quite loose-- everything else fit well (slightly loose on the top for me but ok). If you are curvy or have a short torso I would indeed size up as the hips are the most fitted part (nice for me, so it doesn't bunch when tucked into pants). I am considering taking the sleeves in a bit, so I would recommend not sizing up if your only concern is the arms. Hope this is helpful.I ordered a XL. In US sizing a XL is an 18 or 20 which fits me perfectly. I was sent a XL that is a 16. There is nothing on the sizing chart than starts the English XL is smaller than the US XL. There needs to be a comparisons chart so I could have order the right size. When I tried the shirt on I was very disappointed that there was a 2 inch gap between the buttons and the button holes.The shirt is beautiful. The cut and darts are very nicely done. I love the rounded yoke across the back of the neck. The material is very substantial. This is a great shirt.This is a British product. Had I known that I would have ordered 1-2 sizes larger. It's a fine quality cotton, but I know it will shrink and it is already too small. Large in U.K. is size 12-14 here.Shirt was wonderful quality...however perhaps sizing in UK is different . It was a size smaller . I would oder up a size.For work. Serving. Fit great, looked nice. I am 135lbs - 4'6 - size 4. Ordered Extra Small for a good fit.If you want this shirt order at least two sizes bigger than you normally wear. Three sizes larger would be fine. I had to pay to ship it back.This oxford long sleeve shirt fits perfectly and looks great.I will be purchasing more. Hopefully there are multiple colors available.Way too smallMuch too small, sizing is way off, 4 inches short on a standard uk size - straight to the charity shop for this shirt, hopefully it will do someone a turn.