I’m size 16 which according to the Fruit of the Loom size chart is XL. I went up a size and ordered size XXL because I don’t like t-shirts to fit too tightly. However, the XXL size is not a true size because it fits skin tight. Nice t-shirt very reasonably priced but beware they are much smaller than the sizing suggests. Too much trouble to return, will wear under jumper.
or You can buy it here