The shape of the Zephyr Gaming Mouse is unlike most. It's not a common design at all, but nothing too fancy or risky either. It's clearly a claw-grip shape with a wide back, mostly flat hump towards the back, and a low-sitting front that doesn't flare out. Of note are also the almost entirely straight sides, both vertically and horizontally, which is a rare but very welcome design choice; grip is perfectly secure as a result. The honeycomb pattern is restricted to the back and top, while the sides don't have any holes. It should also be noted that the main buttons are framed instead of open, which is unusual as well. Overall, I was surprised by how well this original design worked in practice.
As for grip styles, due to the rear hump and wide back, I'd say the Zephyr Gaming Mouse is mostly suited for claw grip. It's a medium-sized mouse with a moderately pronounced hump, which should make it suitable for most hand sizes. For reference, my hands are 19 cm long and 10 cm wide, and I found the Zephyr Gaming Mouse very comfortable when claw-gripped.
Dimensions
This table includes the dimensions of the Zephyr Gaming Mouse and several other ambidextrous mice. "Front height" denotes the distance between the base and the 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.
Zephyr Gaming Mouse
Zephyr
XM1
Rival 3
A900
Base Length
11.9 cm
11.6 cm
11.5 cm
11.2 cm
Length (including overhang)
12.13 cm
12.2 cm
11.85 cm
11.7 cm
Front Height (lowest point)
1.4 cm
0.9 cm
0.9 cm
1.4 cm
Height (highest point)
3.98 cm
3.83 cm
3.79 cm
3.68 cm
Front Width (widest point)
5.78 cm
6.16 cm
5.88 cm
5.95 cm
Back Width (widest point)
6.50 cm
6.49 cm
6.69 cm
6.76 cm
Grip Width (narrowest point)
5.80 cm
6.06 cm
5.89 cm
5.64 cm
Here are some comparison shots with each of the measured mice: