Speedo Endurance is down to a 2.5" side this year, as sold here:
https://www.allensswimwear.co.uk/pro...9VQ0By8.RY468J
They have been selling them at up 5" sides and still calling them briefs, Speedo is finally making speedos again. With the big Speedo logo on the rear this is a quite desirable swim brief for public pool swimming.