A tad bit on the expensive side but really happy with quality. Has a modern touch, lovely material and really comfortable to wear. Not a fan of the AI sizing, gave measurements of 90kg, 5ft 7, regular build and it suggested XL, turned about to be a bit on the baggy side. Luckily, I had ordered a medium white for my sign 5ft 5 and 70kg and that fitted me just fine. So, I then ordered a medium in black which I received before Eid so all good.
I typically for jackets/ tops that are 42 inch. So I would say as a guide their medium is for 38-42 inch. Hope that might help someone.