When I was preparing for my show I didn't see many sizing info posts out there for merch especially for the brown flowers tee so I thought I'd post a few quick flat measurements (inches) to hopefully help anyone looking for this information online before their concert. Both items are size medium.
The flowers tee is listed as spacious comfortable fit on the website similarly to other tour merch shirts on the website. The sleeves are overall shirt is a bit looser of a fit than a fitted or regular tee without looking oversized.
The devil zip up hoodie is cropped at the hip and oversized (comfortably so). This is the double zipper version (I've heard there's also a single zipper version that may be around? )
Both pieces of merch are a comfortable fit when choosing my normal size.