Shape
The shape of the Scream One is the same as in the previous Tournament Pro. It's an ambidextrous design with side buttons for right-handed players only. The shape is similar to that of the Zowie FK1+, but flares out a bit wider at the front. The main thing you immediately notice when picking up the mouse is how light it is. At 80g, it feels like a feather for its dimensions. For comparison, the FK1+ weighs 93g and has similar dimensions.
Weight: 81 g
Height: ~39 mm
Width: ~65 mm
Width at grip area: ~61 mm
Length: ~127 mm
Number of buttons: 6
The mouse is very nice to grip in both palm and claw grip.
Comparison
Zowie ZA11 on the left and Zowie FK1+ on the right
Logitech G102 on the left and Logitech G900 on the right
Microsoft WMO on the left and Nixeus Revel on the right
Actual Weight
As proclaimed by FinalMouse, the Scream One is actually really light, coming in at 81g on my kitchen scale.
The weight is evenly distributed between the upper and lower shell.