The cute Mango v2 (GL-MT300N-V2 / N300 Mini Wireless Router from GL Inet) runs OpenWRT, with a MIPS cpu.

It’s measuring 58 x 58 x 25mm, and is USB2 powered!

Is there anything like this, able to run a #BSD or maybe with ARM or RISCV cpu?

https://store-eu.gl-inet.com/products/mango-mini-router-stock-for-eu-region-only

https://openwrt.org/toh/gl.inet/gl-mt300n_v2