Don't just be square, be extra square. The OxC.Pad macropad has 50% extra corners on both board and keycaps. The macropad has per-key RGB LEDs, runs on an integrated Atmel32u2 chip.
The kit consists of a milled aluminum bottom, a laser cut aluminum switchplate, PCB and 12 HEX keycaps. Mounting hardware and bumpons are included as well, all you need to add are switches!
See the build guide here: https://hw.s-ol.nu/0xC.pad/