Shape

The shape of the A660 is is a variation of the classic Logitech "egg" shape. "Egg" refers to the basic silhouette when looking at the mouse from the top: narrow towards the front and back, wide in the middle. The hump is more towards the back and extends across the entire width. Compared to the Logitech G203 or G305, the main difference can be found in the sides. On the G203 and G305, the sides are not only in the \_/ shape, but also bulge outwards, which people more used to the straight sides of the Logitech G100s may dislike. While the sides of the Abkoncore A660 still are slanted, they don't bulge outwards. The slight comfort grooves of the main buttons are another difference.


As for grip styles, I'd say the A660 is best for claw and fingertip grip. It's a medium to small mouse with a mildly 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 A660 very comfortable in claw grip.

Dimensions

This table includes the dimensions of the Abkoncore A660 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.


Here are some comparison shots with each of the measured mice:


Logitech G305


Logitech G100s


ASUS Strix Impact II