The shape of the Burst Pro Air is clearly inspired by the Microsoft Wheel Mouse Optical (WMO): A widened butt, a front that doesn't flare out, and mostly straight sides. There is a key difference, though. Whereas the hump on the WMO is dead center, and gradually slopes down towards both ends, the hump on the Burst Pro Air is positioned more towards the rear. This makes the Burst Pro Air more suited for claw grip, but also affects the dynamic of the shape as a whole, as the butt ends up fuller and more obstructive than on the WMO. Depending on hand size and grip, making vertical adjustments may be easier on the WMO by comparison. Still, the overall profile is sufficiently similar, so long-time WMO fans may find themselves largely at home with the Burst Pro Air. All in all, a neutral and agreeable shape that handles well in practice.
As for grip styles, I'd say the Burst Pro Air generally suits all three main grip styles (palm, claw, and fingertip grip). It is a medium-sized mouse with a moderately pronounced hump, making it generally suit most hand sizes. For reference, my hands are 19 cm long and 10 cm wide, and I found the Burst Pro Air very comfortable in claw grip.
Dimensions
This table includes the dimensions of the ROCCAT Burst Pro Air and several other ambidextrous mice. "Front height" denotes the distance between the base and main buttons. Measurements with two decimals have been taken with a caliper, while those with one decimal have been taken with a ruler. For a full list of all measurements taken, please refer to this sheet compiled by an esteemed community member.
ROCCAT Burst Pro Air Dimensions
Burst Pro Air
Helios XD3 V2
BOLT
MVP Wireless
Viper Ultimate
Base Length
11.6 cm
11.5 cm
11.7 cm
11.7 cm
11.2 cm
Length (including overhang)
12.04 cm
11.95 cm
12.07 cm
12.28 cm
12.5 cm
Front Height (lowest point)
1.1 cm
1.4 cm
1.1 cm
1.2 cm
1.0 cm
Height (highest point)
3.89 cm
3.83 cm
3.74 cm
4.00 cm
3.70 cm
Front Width (widest point)
5.83 cm
6.08 cm
6.11 cm
5.90 cm
6.26 cm
Back Width (widest point)
6.72 cm
6.48 cm
6.16 cm
6.60 cm
6.59 cm
Grip Width (narrowest point)
5.84 cm
5.85 cm
5.71 cm
5.76 cm
5.79 cm
Below are some comparison shots with each of the measured mice: