I always suggest sizing this to a pair of shorts that you already like the fit of. This is a cool looking pair of shorts that seems to be discontinued and/or sold out when I search it on their website.
HOWLER BROTHERS BRUJA NWT Mens Sz 40 Glades Print Stretch Swim Board Shorts
NWT Howler Brothers Buchannon Board Shorts (Men's Size 30) 7.5"
Howler Brothers Stretch Bruja boardshorts in a tropical floral print sz 36
Howler Brothers Mens Orange Blue Color Block Board Shorts Size 38 NWT
Howler Brothers Board Shorts Mens 35 Blue Swim Trunks Beach Active Surf Outdoor
Howler Brothers Horizon Hybrid Shorts 2.0 Petrol Blue Swim Surf
