When the G403 came out, it was the best mouse ever made. Top sensor, good shape, amazing buttons and for the time, it was low weight. These days it's still a favourite but a little outdated in some ways. The cable is thick and not too flexible and mice are getting much lighter. Still, they go pretty cheap on sales so still worth a look and some people still swear by them. If you watch the review you can see it's one of the few large mice that I can aim really well, so there is something to be said for the shape, even though some people don't like the back area. However, I haven't tested the new HERO version, it's slightly lighter and meant to be improved a little... so if this is a mouse you're considering, maybe look at both versions.
|Grip Width||6.1cm | 2.4 inches|
|Hump Width||5.3cm | 2.09 inches|
|Length||12.2cm | 4.8 inches|
|Height||4.2cm | 1.65 inches|