The Kain 120 AIMO arrives in a regular rectangular box, which is unlike ROCCAT, although definitely a welcome surprise. It doesn't feature a window at the front, but does have a lot of colors, render pictures, and specifications. As for its contents, we get the Kain 120, product-promotion booklet, and quick-start guide.
Most ROCCAT mice feature a rather futuristic design that is everything but minimalist, but the Kain 120 definitely aims in a different direction. While not the most minimalist mouse you'll ever see, it is not like an alien spaceship either. The render pictures initially had me think it has an ambidextrous design, but it's actually a right-handed mouse. It doesn't feature any aggressive grooves, and its shape is fairly safe.
It's a medium-sized rodent and is not too wide, but has a relatively high profile. The shell doesn't flare out anywhere, but even without any deep grooves, the design subtly helps with picking up the mouse. The whole right side is slanted downward for a more comfortable palm grip. Speaking of a palm grip, the Kain 120 will mostly suit those who prefer that grip style, but it was comfortable for claw-gripping with my 18x9 cm hands as well, which is, as always, also a matter of personal preference as what suits me might now work for you.
The mouse is about 124.5 mm (4.90") long, which can be considered average for gaming mice. Its total width is 65 mm (2.56"), but the width at which it is gripped is slightly less. The total height is 42.5 mm (1.67"), and the hump is centered. With these dimensions, the Kain 120 AIMO will mostly suit palm grippers with hands between 16–20 cm, but these are just rough guidelines and shouldn't be taken for granted (as I said, I could comfortably use it with a claw grip). It's best to try out a mouse before buying it.
Here are a few extra pictures of the mouse:
ComparisonsHere are some shape/size comparisons with other mice:
SteelSeries Rival 650
Cooler Master MM530