Has anyone got these? They'd be ideal for work but having read various reviews some people say to size up while others say they're true to size. Most say they're quite a wide fit which is good for my flippers but I even asked about sizing on Amazon and got two opposing views. I normally take a 5. One said to go for a 6 while the other said if I'm a 5 not a 5.5then I'd be fine to stick to my usual size.