The Jonis washed denim shirt has been washed down till it's all soft to the hand.
Taking raw 6oz denim and washing it down to a perfect broken in faded denim.
Nudie denim tops generally run more of a slim fit duh to the wash process and I would suggest going up one size from your normal tops sizing.
Sizing: Size this top up one size up from your normal top size.
Tommy is wearing a size large in the photo
(all measurements taken flat)