VortexSeries IGNIX R1 Pro alternatives

The IGNIX R1 Pro is 127.7 mm long, 67.8 mm wide and 42.8 mm tall, at 63 g. It suits claw-grip hands of about 19.1–21.3 cm. These are the mice closest to it in size, ergonomic shapes first, so they should feel familiar in the same hand.