Every garment has its own description and size chart. Please read this carefully before you order.
Generally speaking, I can say the normal T-shirts, sweatshirts and hoodies will run a size bigger for EU customers. I live in Belgium and normally wear T-shirts size Extra Large. But I have to order Large so it won’t feel baggy. But the size charts are very accurate so always refer to them. You just have to measure yourself once!
For women slim fit T-shirts like the Triblend, it goes more toward EU standard.