The shape of the OGM Pro is rather unique. Of particular note is how bulky the mouse is. The left side barely curves in, resulting in an above average grip width relative to its length, and the left side is barely raised, which has the top extend fully across the entire width, somewhat similarly to the VAXEE Zygen NP-01. As the middle is already very wide, the front and rear barely flare out, creating a silhouette largely lacking in curves. The hump is fully centered and slopes down gradually towards both ends. In addition, the hump and profile of the mouse in general are rather tall, further adding to the bulkiness of the mouse. Accordingly, despite matching a Zowie EC2 in general size, the OGM Pro feels much fuller in-hand and lends itself better to larger hands than the comparatively slim EC2.
As for grip styles, I'd say the OGM Pro is generally suited for palm and claw grip. It is a medium-sized mouse with a fairly pronounced hump, which makes it generally suit medium to large hands. For reference, my hands are 19 cm long and 10 cm wide, and I found the OGM Pro very comfortable in claw grip.
Dimensions
This table includes the dimensions of the Waizowl OGM Pro and several other right-handed ergonomic 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.
Waizowl OGM Pro Dimensions
OGM Pro
DeathAdder V3 Pro
Xlite Wireless V2
StormBreaker
AX
Base Length
11.4 cm
11.3 cm
11.6 cm
10.8 cm
11.1 cm
Length (including overhang)
12.15 cm
12.76 cm
12.36 cm
12.16 cm
11.75 cm
Front Height (lowest point)
1.6 cm
1.4 cm
1.3 cm
1.2 cm
1.3 cm
Height (highest point)
4.11 cm
4.28 cm
4.27 cm
4.13 cm
4.30 cm
Front Width (widest point)
5.92 cm
6.29 cm
6.09 cm
5.96 cm
6.12 cm
Back Width (widest point)
6.62 cm
6.51 cm
6.50 cm
6.35 cm
6.55 cm
Grip Width (narrowest point)
6.14 cm
6.07 cm
6.03 cm
5.81 cm
5.94 cm
Below are some comparison shots with each of the measured mice: