Compact router with two ethernet interfaces and power over usb?

Question

network hardware

We are looking for a device with the following characteristics:
- two Ethernet interfaces
- powered via USB
- no wifi needed
- the ability to run OpenWRT or its equivalent
- the price is within $40.
Found: Mikrotik mAP, Nexx 3020f, GL-AR150.
Does anyone produce even more compact models?
Ideally, I would like to have a router in the form factor of a pass-through adapter for RJ-45 (or a little larger): height within 4 cm, thickness within 2 cm, length is not critical, Ethernet connectors on the ends, micro-USB on the side for power.

Answer 1

I have never seen anything more compact than the nexx wt3020h, the stuffing is decent, the price is excellent.

Answer 2

If the dimensions are still not so critical, then Mikrotik hAP Lite.